+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Copyright (C) 2008
- * Guennadi Liakhovetski, DENX Software Engineering, <lg@denx.de>
- *
- * Copyright (C) 2005-2007 Freescale Semiconductor, Inc. All Rights Reserved.
- */
-
-#include <linux/dma-mapping.h>
-#include <linux/init.h>
-#include <linux/platform_device.h>
-#include <linux/err.h>
-#include <linux/spinlock.h>
-#include <linux/delay.h>
-#include <linux/list.h>
-#include <linux/clk.h>
-#include <linux/vmalloc.h>
-#include <linux/string.h>
-#include <linux/interrupt.h>
-#include <linux/io.h>
-#include <linux/module.h>
-#include <linux/dma/ipu-dma.h>
-
-#include "../dmaengine.h"
-#include "ipu_intern.h"
-
-#define FS_VF_IN_VALID 0x00000002
-#define FS_ENC_IN_VALID 0x00000001
-
-static int ipu_disable_channel(struct idmac *idmac, struct idmac_channel *ichan,
- bool wait_for_stop);
-
-/*
- * There can be only one, we could allocate it dynamically, but then we'd have
- * to add an extra parameter to some functions, and use something as ugly as
- * struct ipu *ipu = to_ipu(to_idmac(ichan->dma_chan.device));
- * in the ISR
- */
-static struct ipu ipu_data;
-
-#define to_ipu(id) container_of(id, struct ipu, idmac)
-
-static u32 __idmac_read_icreg(struct ipu *ipu, unsigned long reg)
-{
- return __raw_readl(ipu->reg_ic + reg);
-}
-
-#define idmac_read_icreg(ipu, reg) __idmac_read_icreg(ipu, reg - IC_CONF)
-
-static void __idmac_write_icreg(struct ipu *ipu, u32 value, unsigned long reg)
-{
- __raw_writel(value, ipu->reg_ic + reg);
-}
-
-#define idmac_write_icreg(ipu, v, reg) __idmac_write_icreg(ipu, v, reg - IC_CONF)
-
-static u32 idmac_read_ipureg(struct ipu *ipu, unsigned long reg)
-{
- return __raw_readl(ipu->reg_ipu + reg);
-}
-
-static void idmac_write_ipureg(struct ipu *ipu, u32 value, unsigned long reg)
-{
- __raw_writel(value, ipu->reg_ipu + reg);
-}
-
-/*****************************************************************************
- * IPU / IC common functions
- */
-static void dump_idmac_reg(struct ipu *ipu)
-{
- dev_dbg(ipu->dev, "IDMAC_CONF 0x%x, IC_CONF 0x%x, IDMAC_CHA_EN 0x%x, "
- "IDMAC_CHA_PRI 0x%x, IDMAC_CHA_BUSY 0x%x\n",
- idmac_read_icreg(ipu, IDMAC_CONF),
- idmac_read_icreg(ipu, IC_CONF),
- idmac_read_icreg(ipu, IDMAC_CHA_EN),
- idmac_read_icreg(ipu, IDMAC_CHA_PRI),
- idmac_read_icreg(ipu, IDMAC_CHA_BUSY));
- dev_dbg(ipu->dev, "BUF0_RDY 0x%x, BUF1_RDY 0x%x, CUR_BUF 0x%x, "
- "DB_MODE 0x%x, TASKS_STAT 0x%x\n",
- idmac_read_ipureg(ipu, IPU_CHA_BUF0_RDY),
- idmac_read_ipureg(ipu, IPU_CHA_BUF1_RDY),
- idmac_read_ipureg(ipu, IPU_CHA_CUR_BUF),
- idmac_read_ipureg(ipu, IPU_CHA_DB_MODE_SEL),
- idmac_read_ipureg(ipu, IPU_TASKS_STAT));
-}
-
-static uint32_t bytes_per_pixel(enum pixel_fmt fmt)
-{
- switch (fmt) {
- case IPU_PIX_FMT_GENERIC: /* generic data */
- case IPU_PIX_FMT_RGB332:
- case IPU_PIX_FMT_YUV420P:
- case IPU_PIX_FMT_YUV422P:
- default:
- return 1;
- case IPU_PIX_FMT_RGB565:
- case IPU_PIX_FMT_YUYV:
- case IPU_PIX_FMT_UYVY:
- return 2;
- case IPU_PIX_FMT_BGR24:
- case IPU_PIX_FMT_RGB24:
- return 3;
- case IPU_PIX_FMT_GENERIC_32: /* generic data */
- case IPU_PIX_FMT_BGR32:
- case IPU_PIX_FMT_RGB32:
- case IPU_PIX_FMT_ABGR32:
- return 4;
- }
-}
-
-/* Enable direct write to memory by the Camera Sensor Interface */
-static void ipu_ic_enable_task(struct ipu *ipu, enum ipu_channel channel)
-{
- uint32_t ic_conf, mask;
-
- switch (channel) {
- case IDMAC_IC_0:
- mask = IC_CONF_PRPENC_EN;
- break;
- case IDMAC_IC_7:
- mask = IC_CONF_RWS_EN | IC_CONF_PRPENC_EN;
- break;
- default:
- return;
- }
- ic_conf = idmac_read_icreg(ipu, IC_CONF) | mask;
- idmac_write_icreg(ipu, ic_conf, IC_CONF);
-}
-
-/* Called under spin_lock_irqsave(&ipu_data.lock) */
-static void ipu_ic_disable_task(struct ipu *ipu, enum ipu_channel channel)
-{
- uint32_t ic_conf, mask;
-
- switch (channel) {
- case IDMAC_IC_0:
- mask = IC_CONF_PRPENC_EN;
- break;
- case IDMAC_IC_7:
- mask = IC_CONF_RWS_EN | IC_CONF_PRPENC_EN;
- break;
- default:
- return;
- }
- ic_conf = idmac_read_icreg(ipu, IC_CONF) & ~mask;
- idmac_write_icreg(ipu, ic_conf, IC_CONF);
-}
-
-static uint32_t ipu_channel_status(struct ipu *ipu, enum ipu_channel channel)
-{
- uint32_t stat = TASK_STAT_IDLE;
- uint32_t task_stat_reg = idmac_read_ipureg(ipu, IPU_TASKS_STAT);
-
- switch (channel) {
- case IDMAC_IC_7:
- stat = (task_stat_reg & TSTAT_CSI2MEM_MASK) >>
- TSTAT_CSI2MEM_OFFSET;
- break;
- case IDMAC_IC_0:
- case IDMAC_SDC_0:
- case IDMAC_SDC_1:
- default:
- break;
- }
- return stat;
-}
-
-struct chan_param_mem_planar {
- /* Word 0 */
- u32 xv:10;
- u32 yv:10;
- u32 xb:12;
-
- u32 yb:12;
- u32 res1:2;
- u32 nsb:1;
- u32 lnpb:6;
- u32 ubo_l:11;
-
- u32 ubo_h:15;
- u32 vbo_l:17;
-
- u32 vbo_h:9;
- u32 res2:3;
- u32 fw:12;
- u32 fh_l:8;
-
- u32 fh_h:4;
- u32 res3:28;
-
- /* Word 1 */
- u32 eba0;
-
- u32 eba1;
-
- u32 bpp:3;
- u32 sl:14;
- u32 pfs:3;
- u32 bam:3;
- u32 res4:2;
- u32 npb:6;
- u32 res5:1;
-
- u32 sat:2;
- u32 res6:30;
-} __attribute__ ((packed));
-
-struct chan_param_mem_interleaved {
- /* Word 0 */
- u32 xv:10;
- u32 yv:10;
- u32 xb:12;
-
- u32 yb:12;
- u32 sce:1;
- u32 res1:1;
- u32 nsb:1;
- u32 lnpb:6;
- u32 sx:10;
- u32 sy_l:1;
-
- u32 sy_h:9;
- u32 ns:10;
- u32 sm:10;
- u32 sdx_l:3;
-
- u32 sdx_h:2;
- u32 sdy:5;
- u32 sdrx:1;
- u32 sdry:1;
- u32 sdr1:1;
- u32 res2:2;
- u32 fw:12;
- u32 fh_l:8;
-
- u32 fh_h:4;
- u32 res3:28;
-
- /* Word 1 */
- u32 eba0;
-
- u32 eba1;
-
- u32 bpp:3;
- u32 sl:14;
- u32 pfs:3;
- u32 bam:3;
- u32 res4:2;
- u32 npb:6;
- u32 res5:1;
-
- u32 sat:2;
- u32 scc:1;
- u32 ofs0:5;
- u32 ofs1:5;
- u32 ofs2:5;
- u32 ofs3:5;
- u32 wid0:3;
- u32 wid1:3;
- u32 wid2:3;
-
- u32 wid3:3;
- u32 dec_sel:1;
- u32 res6:28;
-} __attribute__ ((packed));
-
-union chan_param_mem {
- struct chan_param_mem_planar pp;
- struct chan_param_mem_interleaved ip;
-};
-
-static void ipu_ch_param_set_plane_offset(union chan_param_mem *params,
- u32 u_offset, u32 v_offset)
-{
- params->pp.ubo_l = u_offset & 0x7ff;
- params->pp.ubo_h = u_offset >> 11;
- params->pp.vbo_l = v_offset & 0x1ffff;
- params->pp.vbo_h = v_offset >> 17;
-}
-
-static void ipu_ch_param_set_size(union chan_param_mem *params,
- uint32_t pixel_fmt, uint16_t width,
- uint16_t height, uint16_t stride)
-{
- u32 u_offset;
- u32 v_offset;
-
- params->pp.fw = width - 1;
- params->pp.fh_l = height - 1;
- params->pp.fh_h = (height - 1) >> 8;
- params->pp.sl = stride - 1;
-
- switch (pixel_fmt) {
- case IPU_PIX_FMT_GENERIC:
- /*Represents 8-bit Generic data */
- params->pp.bpp = 3;
- params->pp.pfs = 7;
- params->pp.npb = 31;
- params->pp.sat = 2; /* SAT = use 32-bit access */
- break;
- case IPU_PIX_FMT_GENERIC_32:
- /*Represents 32-bit Generic data */
- params->pp.bpp = 0;
- params->pp.pfs = 7;
- params->pp.npb = 7;
- params->pp.sat = 2; /* SAT = use 32-bit access */
- break;
- case IPU_PIX_FMT_RGB565:
- params->ip.bpp = 2;
- params->ip.pfs = 4;
- params->ip.npb = 15;
- params->ip.sat = 2; /* SAT = 32-bit access */
- params->ip.ofs0 = 0; /* Red bit offset */
- params->ip.ofs1 = 5; /* Green bit offset */
- params->ip.ofs2 = 11; /* Blue bit offset */
- params->ip.ofs3 = 16; /* Alpha bit offset */
- params->ip.wid0 = 4; /* Red bit width - 1 */
- params->ip.wid1 = 5; /* Green bit width - 1 */
- params->ip.wid2 = 4; /* Blue bit width - 1 */
- break;
- case IPU_PIX_FMT_BGR24:
- params->ip.bpp = 1; /* 24 BPP & RGB PFS */
- params->ip.pfs = 4;
- params->ip.npb = 7;
- params->ip.sat = 2; /* SAT = 32-bit access */
- params->ip.ofs0 = 0; /* Red bit offset */
- params->ip.ofs1 = 8; /* Green bit offset */
- params->ip.ofs2 = 16; /* Blue bit offset */
- params->ip.ofs3 = 24; /* Alpha bit offset */
- params->ip.wid0 = 7; /* Red bit width - 1 */
- params->ip.wid1 = 7; /* Green bit width - 1 */
- params->ip.wid2 = 7; /* Blue bit width - 1 */
- break;
- case IPU_PIX_FMT_RGB24:
- params->ip.bpp = 1; /* 24 BPP & RGB PFS */
- params->ip.pfs = 4;
- params->ip.npb = 7;
- params->ip.sat = 2; /* SAT = 32-bit access */
- params->ip.ofs0 = 16; /* Red bit offset */
- params->ip.ofs1 = 8; /* Green bit offset */
- params->ip.ofs2 = 0; /* Blue bit offset */
- params->ip.ofs3 = 24; /* Alpha bit offset */
- params->ip.wid0 = 7; /* Red bit width - 1 */
- params->ip.wid1 = 7; /* Green bit width - 1 */
- params->ip.wid2 = 7; /* Blue bit width - 1 */
- break;
- case IPU_PIX_FMT_BGRA32:
- case IPU_PIX_FMT_BGR32:
- case IPU_PIX_FMT_ABGR32:
- params->ip.bpp = 0;
- params->ip.pfs = 4;
- params->ip.npb = 7;
- params->ip.sat = 2; /* SAT = 32-bit access */
- params->ip.ofs0 = 8; /* Red bit offset */
- params->ip.ofs1 = 16; /* Green bit offset */
- params->ip.ofs2 = 24; /* Blue bit offset */
- params->ip.ofs3 = 0; /* Alpha bit offset */
- params->ip.wid0 = 7; /* Red bit width - 1 */
- params->ip.wid1 = 7; /* Green bit width - 1 */
- params->ip.wid2 = 7; /* Blue bit width - 1 */
- params->ip.wid3 = 7; /* Alpha bit width - 1 */
- break;
- case IPU_PIX_FMT_RGBA32:
- case IPU_PIX_FMT_RGB32:
- params->ip.bpp = 0;
- params->ip.pfs = 4;
- params->ip.npb = 7;
- params->ip.sat = 2; /* SAT = 32-bit access */
- params->ip.ofs0 = 24; /* Red bit offset */
- params->ip.ofs1 = 16; /* Green bit offset */
- params->ip.ofs2 = 8; /* Blue bit offset */
- params->ip.ofs3 = 0; /* Alpha bit offset */
- params->ip.wid0 = 7; /* Red bit width - 1 */
- params->ip.wid1 = 7; /* Green bit width - 1 */
- params->ip.wid2 = 7; /* Blue bit width - 1 */
- params->ip.wid3 = 7; /* Alpha bit width - 1 */
- break;
- case IPU_PIX_FMT_UYVY:
- params->ip.bpp = 2;
- params->ip.pfs = 6;
- params->ip.npb = 7;
- params->ip.sat = 2; /* SAT = 32-bit access */
- break;
- case IPU_PIX_FMT_YUV420P2:
- case IPU_PIX_FMT_YUV420P:
- params->ip.bpp = 3;
- params->ip.pfs = 3;
- params->ip.npb = 7;
- params->ip.sat = 2; /* SAT = 32-bit access */
- u_offset = stride * height;
- v_offset = u_offset + u_offset / 4;
- ipu_ch_param_set_plane_offset(params, u_offset, v_offset);
- break;
- case IPU_PIX_FMT_YVU422P:
- params->ip.bpp = 3;
- params->ip.pfs = 2;
- params->ip.npb = 7;
- params->ip.sat = 2; /* SAT = 32-bit access */
- v_offset = stride * height;
- u_offset = v_offset + v_offset / 2;
- ipu_ch_param_set_plane_offset(params, u_offset, v_offset);
- break;
- case IPU_PIX_FMT_YUV422P:
- params->ip.bpp = 3;
- params->ip.pfs = 2;
- params->ip.npb = 7;
- params->ip.sat = 2; /* SAT = 32-bit access */
- u_offset = stride * height;
- v_offset = u_offset + u_offset / 2;
- ipu_ch_param_set_plane_offset(params, u_offset, v_offset);
- break;
- default:
- dev_err(ipu_data.dev,
- "mx3 ipu: unimplemented pixel format %d\n", pixel_fmt);
- break;
- }
-
- params->pp.nsb = 1;
-}
-
-static void ipu_ch_param_set_buffer(union chan_param_mem *params,
- dma_addr_t buf0, dma_addr_t buf1)
-{
- params->pp.eba0 = buf0;
- params->pp.eba1 = buf1;
-}
-
-static void ipu_ch_param_set_rotation(union chan_param_mem *params,
- enum ipu_rotate_mode rotate)
-{
- params->pp.bam = rotate;
-}
-
-static void ipu_write_param_mem(uint32_t addr, uint32_t *data,
- uint32_t num_words)
-{
- for (; num_words > 0; num_words--) {
- dev_dbg(ipu_data.dev,
- "write param mem - addr = 0x%08X, data = 0x%08X\n",
- addr, *data);
- idmac_write_ipureg(&ipu_data, addr, IPU_IMA_ADDR);
- idmac_write_ipureg(&ipu_data, *data++, IPU_IMA_DATA);
- addr++;
- if ((addr & 0x7) == 5) {
- addr &= ~0x7; /* set to word 0 */
- addr += 8; /* increment to next row */
- }
- }
-}
-
-static int calc_resize_coeffs(uint32_t in_size, uint32_t out_size,
- uint32_t *resize_coeff,
- uint32_t *downsize_coeff)
-{
- uint32_t temp_size;
- uint32_t temp_downsize;
-
- *resize_coeff = 1 << 13;
- *downsize_coeff = 1 << 13;
-
- /* Cannot downsize more than 8:1 */
- if (out_size << 3 < in_size)
- return -EINVAL;
-
- /* compute downsizing coefficient */
- temp_downsize = 0;
- temp_size = in_size;
- while (temp_size >= out_size * 2 && temp_downsize < 2) {
- temp_size >>= 1;
- temp_downsize++;
- }
- *downsize_coeff = temp_downsize;
-
- /*
- * compute resizing coefficient using the following formula:
- * resize_coeff = M*(SI -1)/(SO - 1)
- * where M = 2^13, SI - input size, SO - output size
- */
- *resize_coeff = (8192L * (temp_size - 1)) / (out_size - 1);
- if (*resize_coeff >= 16384L) {
- dev_err(ipu_data.dev, "Warning! Overflow on resize coeff.\n");
- *resize_coeff = 0x3FFF;
- }
-
- dev_dbg(ipu_data.dev, "resizing from %u -> %u pixels, "
- "downsize=%u, resize=%u.%lu (reg=%u)\n", in_size, out_size,
- *downsize_coeff, *resize_coeff >= 8192L ? 1 : 0,
- ((*resize_coeff & 0x1FFF) * 10000L) / 8192L, *resize_coeff);
-
- return 0;
-}
-
-static enum ipu_color_space format_to_colorspace(enum pixel_fmt fmt)
-{
- switch (fmt) {
- case IPU_PIX_FMT_RGB565:
- case IPU_PIX_FMT_BGR24:
- case IPU_PIX_FMT_RGB24:
- case IPU_PIX_FMT_BGR32:
- case IPU_PIX_FMT_RGB32:
- return IPU_COLORSPACE_RGB;
- default:
- return IPU_COLORSPACE_YCBCR;
- }
-}
-
-static int ipu_ic_init_prpenc(struct ipu *ipu,
- union ipu_channel_param *params, bool src_is_csi)
-{
- uint32_t reg, ic_conf;
- uint32_t downsize_coeff, resize_coeff;
- enum ipu_color_space in_fmt, out_fmt;
-
- /* Setup vertical resizing */
- calc_resize_coeffs(params->video.in_height,
- params->video.out_height,
- &resize_coeff, &downsize_coeff);
- reg = (downsize_coeff << 30) | (resize_coeff << 16);
-
- /* Setup horizontal resizing */
- calc_resize_coeffs(params->video.in_width,
- params->video.out_width,
- &resize_coeff, &downsize_coeff);
- reg |= (downsize_coeff << 14) | resize_coeff;
-
- /* Setup color space conversion */
- in_fmt = format_to_colorspace(params->video.in_pixel_fmt);
- out_fmt = format_to_colorspace(params->video.out_pixel_fmt);
-
- /*
- * Colourspace conversion unsupported yet - see _init_csc() in
- * Freescale sources
- */
- if (in_fmt != out_fmt) {
- dev_err(ipu->dev, "Colourspace conversion unsupported!\n");
- return -EOPNOTSUPP;
- }
-
- idmac_write_icreg(ipu, reg, IC_PRP_ENC_RSC);
-
- ic_conf = idmac_read_icreg(ipu, IC_CONF);
-
- if (src_is_csi)
- ic_conf &= ~IC_CONF_RWS_EN;
- else
- ic_conf |= IC_CONF_RWS_EN;
-
- idmac_write_icreg(ipu, ic_conf, IC_CONF);
-
- return 0;
-}
-
-static uint32_t dma_param_addr(uint32_t dma_ch)
-{
- /* Channel Parameter Memory */
- return 0x10000 | (dma_ch << 4);
-}
-
-static void ipu_channel_set_priority(struct ipu *ipu, enum ipu_channel channel,
- bool prio)
-{
- u32 reg = idmac_read_icreg(ipu, IDMAC_CHA_PRI);
-
- if (prio)
- reg |= 1UL << channel;
- else
- reg &= ~(1UL << channel);
-
- idmac_write_icreg(ipu, reg, IDMAC_CHA_PRI);
-
- dump_idmac_reg(ipu);
-}
-
-static uint32_t ipu_channel_conf_mask(enum ipu_channel channel)
-{
- uint32_t mask;
-
- switch (channel) {
- case IDMAC_IC_0:
- case IDMAC_IC_7:
- mask = IPU_CONF_CSI_EN | IPU_CONF_IC_EN;
- break;
- case IDMAC_SDC_0:
- case IDMAC_SDC_1:
- mask = IPU_CONF_SDC_EN | IPU_CONF_DI_EN;
- break;
- default:
- mask = 0;
- break;
- }
-
- return mask;
-}
-
-/**
- * ipu_enable_channel() - enable an IPU channel.
- * @idmac: IPU DMAC context.
- * @ichan: IDMAC channel.
- * @return: 0 on success or negative error code on failure.
- */
-static int ipu_enable_channel(struct idmac *idmac, struct idmac_channel *ichan)
-{
- struct ipu *ipu = to_ipu(idmac);
- enum ipu_channel channel = ichan->dma_chan.chan_id;
- uint32_t reg;
- unsigned long flags;
-
- spin_lock_irqsave(&ipu->lock, flags);
-
- /* Reset to buffer 0 */
- idmac_write_ipureg(ipu, 1UL << channel, IPU_CHA_CUR_BUF);
- ichan->active_buffer = 0;
- ichan->status = IPU_CHANNEL_ENABLED;
-
- switch (channel) {
- case IDMAC_SDC_0:
- case IDMAC_SDC_1:
- case IDMAC_IC_7:
- ipu_channel_set_priority(ipu, channel, true);
- break;
- default:
- break;
- }
-
- reg = idmac_read_icreg(ipu, IDMAC_CHA_EN);
-
- idmac_write_icreg(ipu, reg | (1UL << channel), IDMAC_CHA_EN);
-
- ipu_ic_enable_task(ipu, channel);
-
- spin_unlock_irqrestore(&ipu->lock, flags);
- return 0;
-}
-
-/**
- * ipu_init_channel_buffer() - initialize a buffer for logical IPU channel.
- * @ichan: IDMAC channel.
- * @pixel_fmt: pixel format of buffer. Pixel format is a FOURCC ASCII code.
- * @width: width of buffer in pixels.
- * @height: height of buffer in pixels.
- * @stride: stride length of buffer in pixels.
- * @rot_mode: rotation mode of buffer. A rotation setting other than
- * IPU_ROTATE_VERT_FLIP should only be used for input buffers of
- * rotation channels.
- * @phyaddr_0: buffer 0 physical address.
- * @phyaddr_1: buffer 1 physical address. Setting this to a value other than
- * NULL enables double buffering mode.
- * @return: 0 on success or negative error code on failure.
- */
-static int ipu_init_channel_buffer(struct idmac_channel *ichan,
- enum pixel_fmt pixel_fmt,
- uint16_t width, uint16_t height,
- uint32_t stride,
- enum ipu_rotate_mode rot_mode,
- dma_addr_t phyaddr_0, dma_addr_t phyaddr_1)
-{
- enum ipu_channel channel = ichan->dma_chan.chan_id;
- struct idmac *idmac = to_idmac(ichan->dma_chan.device);
- struct ipu *ipu = to_ipu(idmac);
- union chan_param_mem params = {};
- unsigned long flags;
- uint32_t reg;
- uint32_t stride_bytes;
-
- stride_bytes = stride * bytes_per_pixel(pixel_fmt);
-
- if (stride_bytes % 4) {
- dev_err(ipu->dev,
- "Stride length must be 32-bit aligned, stride = %d, bytes = %d\n",
- stride, stride_bytes);
- return -EINVAL;
- }
-
- /* IC channel's stride must be a multiple of 8 pixels */
- if ((channel <= IDMAC_IC_13) && (stride % 8)) {
- dev_err(ipu->dev, "Stride must be 8 pixel multiple\n");
- return -EINVAL;
- }
-
- /* Build parameter memory data for DMA channel */
- ipu_ch_param_set_size(¶ms, pixel_fmt, width, height, stride_bytes);
- ipu_ch_param_set_buffer(¶ms, phyaddr_0, phyaddr_1);
- ipu_ch_param_set_rotation(¶ms, rot_mode);
-
- spin_lock_irqsave(&ipu->lock, flags);
-
- ipu_write_param_mem(dma_param_addr(channel), (uint32_t *)¶ms, 10);
-
- reg = idmac_read_ipureg(ipu, IPU_CHA_DB_MODE_SEL);
-
- if (phyaddr_1)
- reg |= 1UL << channel;
- else
- reg &= ~(1UL << channel);
-
- idmac_write_ipureg(ipu, reg, IPU_CHA_DB_MODE_SEL);
-
- ichan->status = IPU_CHANNEL_READY;
-
- spin_unlock_irqrestore(&ipu->lock, flags);
-
- return 0;
-}
-
-/**
- * ipu_select_buffer() - mark a channel's buffer as ready.
- * @channel: channel ID.
- * @buffer_n: buffer number to mark ready.
- */
-static void ipu_select_buffer(enum ipu_channel channel, int buffer_n)
-{
- /* No locking - this is a write-one-to-set register, cleared by IPU */
- if (buffer_n == 0)
- /* Mark buffer 0 as ready. */
- idmac_write_ipureg(&ipu_data, 1UL << channel, IPU_CHA_BUF0_RDY);
- else
- /* Mark buffer 1 as ready. */
- idmac_write_ipureg(&ipu_data, 1UL << channel, IPU_CHA_BUF1_RDY);
-}
-
-/**
- * ipu_update_channel_buffer() - update physical address of a channel buffer.
- * @ichan: IDMAC channel.
- * @buffer_n: buffer number to update.
- * 0 or 1 are the only valid values.
- * @phyaddr: buffer physical address.
- */
-/* Called under spin_lock(_irqsave)(&ichan->lock) */
-static void ipu_update_channel_buffer(struct idmac_channel *ichan,
- int buffer_n, dma_addr_t phyaddr)
-{
- enum ipu_channel channel = ichan->dma_chan.chan_id;
- uint32_t reg;
- unsigned long flags;
-
- spin_lock_irqsave(&ipu_data.lock, flags);
-
- if (buffer_n == 0) {
- reg = idmac_read_ipureg(&ipu_data, IPU_CHA_BUF0_RDY);
- if (reg & (1UL << channel)) {
- ipu_ic_disable_task(&ipu_data, channel);
- ichan->status = IPU_CHANNEL_READY;
- }
-
- /* 44.3.3.1.9 - Row Number 1 (WORD1, offset 0) */
- idmac_write_ipureg(&ipu_data, dma_param_addr(channel) +
- 0x0008UL, IPU_IMA_ADDR);
- idmac_write_ipureg(&ipu_data, phyaddr, IPU_IMA_DATA);
- } else {
- reg = idmac_read_ipureg(&ipu_data, IPU_CHA_BUF1_RDY);
- if (reg & (1UL << channel)) {
- ipu_ic_disable_task(&ipu_data, channel);
- ichan->status = IPU_CHANNEL_READY;
- }
-
- /* Check if double-buffering is already enabled */
- reg = idmac_read_ipureg(&ipu_data, IPU_CHA_DB_MODE_SEL);
-
- if (!(reg & (1UL << channel)))
- idmac_write_ipureg(&ipu_data, reg | (1UL << channel),
- IPU_CHA_DB_MODE_SEL);
-
- /* 44.3.3.1.9 - Row Number 1 (WORD1, offset 1) */
- idmac_write_ipureg(&ipu_data, dma_param_addr(channel) +
- 0x0009UL, IPU_IMA_ADDR);
- idmac_write_ipureg(&ipu_data, phyaddr, IPU_IMA_DATA);
- }
-
- spin_unlock_irqrestore(&ipu_data.lock, flags);
-}
-
-/* Called under spin_lock_irqsave(&ichan->lock) */
-static int ipu_submit_buffer(struct idmac_channel *ichan,
- struct idmac_tx_desc *desc, struct scatterlist *sg, int buf_idx)
-{
- unsigned int chan_id = ichan->dma_chan.chan_id;
- struct device *dev = &ichan->dma_chan.dev->device;
-
- if (async_tx_test_ack(&desc->txd))
- return -EINTR;
-
- /*
- * On first invocation this shouldn't be necessary, the call to
- * ipu_init_channel_buffer() above will set addresses for us, so we
- * could make it conditional on status >= IPU_CHANNEL_ENABLED, but
- * doing it again shouldn't hurt either.
- */
- ipu_update_channel_buffer(ichan, buf_idx, sg_dma_address(sg));
-
- ipu_select_buffer(chan_id, buf_idx);
- dev_dbg(dev, "Updated sg %p on channel 0x%x buffer %d\n",
- sg, chan_id, buf_idx);
-
- return 0;
-}
-
-/* Called under spin_lock_irqsave(&ichan->lock) */
-static int ipu_submit_channel_buffers(struct idmac_channel *ichan,
- struct idmac_tx_desc *desc)
-{
- struct scatterlist *sg;
- int i, ret = 0;
-
- for (i = 0, sg = desc->sg; i < 2 && sg; i++) {
- if (!ichan->sg[i]) {
- ichan->sg[i] = sg;
-
- ret = ipu_submit_buffer(ichan, desc, sg, i);
- if (ret < 0)
- return ret;
-
- sg = sg_next(sg);
- }
- }
-
- return ret;
-}
-
-static dma_cookie_t idmac_tx_submit(struct dma_async_tx_descriptor *tx)
-{
- struct idmac_tx_desc *desc = to_tx_desc(tx);
- struct idmac_channel *ichan = to_idmac_chan(tx->chan);
- struct idmac *idmac = to_idmac(tx->chan->device);
- struct ipu *ipu = to_ipu(idmac);
- struct device *dev = &ichan->dma_chan.dev->device;
- dma_cookie_t cookie;
- unsigned long flags;
- int ret;
-
- /* Sanity check */
- if (!list_empty(&desc->list)) {
- /* The descriptor doesn't belong to client */
- dev_err(dev, "Descriptor %p not prepared!\n", tx);
- return -EBUSY;
- }
-
- mutex_lock(&ichan->chan_mutex);
-
- async_tx_clear_ack(tx);
-
- if (ichan->status < IPU_CHANNEL_READY) {
- struct idmac_video_param *video = &ichan->params.video;
- /*
- * Initial buffer assignment - the first two sg-entries from
- * the descriptor will end up in the IDMAC buffers
- */
- dma_addr_t dma_1 = sg_is_last(desc->sg) ? 0 :
- sg_dma_address(&desc->sg[1]);
-
- WARN_ON(ichan->sg[0] || ichan->sg[1]);
-
- cookie = ipu_init_channel_buffer(ichan,
- video->out_pixel_fmt,
- video->out_width,
- video->out_height,
- video->out_stride,
- IPU_ROTATE_NONE,
- sg_dma_address(&desc->sg[0]),
- dma_1);
- if (cookie < 0)
- goto out;
- }
-
- dev_dbg(dev, "Submitting sg %p\n", &desc->sg[0]);
-
- cookie = dma_cookie_assign(tx);
-
- /* ipu->lock can be taken under ichan->lock, but not v.v. */
- spin_lock_irqsave(&ichan->lock, flags);
-
- list_add_tail(&desc->list, &ichan->queue);
- /* submit_buffers() atomically verifies and fills empty sg slots */
- ret = ipu_submit_channel_buffers(ichan, desc);
-
- spin_unlock_irqrestore(&ichan->lock, flags);
-
- if (ret < 0) {
- cookie = ret;
- goto dequeue;
- }
-
- if (ichan->status < IPU_CHANNEL_ENABLED) {
- ret = ipu_enable_channel(idmac, ichan);
- if (ret < 0) {
- cookie = ret;
- goto dequeue;
- }
- }
-
- dump_idmac_reg(ipu);
-
-dequeue:
- if (cookie < 0) {
- spin_lock_irqsave(&ichan->lock, flags);
- list_del_init(&desc->list);
- spin_unlock_irqrestore(&ichan->lock, flags);
- tx->cookie = cookie;
- ichan->dma_chan.cookie = cookie;
- }
-
-out:
- mutex_unlock(&ichan->chan_mutex);
-
- return cookie;
-}
-
-/* Called with ichan->chan_mutex held */
-static int idmac_desc_alloc(struct idmac_channel *ichan, int n)
-{
- struct idmac_tx_desc *desc =
- vmalloc(array_size(n, sizeof(struct idmac_tx_desc)));
- struct idmac *idmac = to_idmac(ichan->dma_chan.device);
-
- if (!desc)
- return -ENOMEM;
-
- /* No interrupts, just disable the tasklet for a moment */
- tasklet_disable(&to_ipu(idmac)->tasklet);
-
- ichan->n_tx_desc = n;
- ichan->desc = desc;
- INIT_LIST_HEAD(&ichan->queue);
- INIT_LIST_HEAD(&ichan->free_list);
-
- while (n--) {
- struct dma_async_tx_descriptor *txd = &desc->txd;
-
- memset(txd, 0, sizeof(*txd));
- dma_async_tx_descriptor_init(txd, &ichan->dma_chan);
- txd->tx_submit = idmac_tx_submit;
-
- list_add(&desc->list, &ichan->free_list);
-
- desc++;
- }
-
- tasklet_enable(&to_ipu(idmac)->tasklet);
-
- return 0;
-}
-
-/**
- * ipu_init_channel() - initialize an IPU channel.
- * @idmac: IPU DMAC context.
- * @ichan: pointer to the channel object.
- * @return 0 on success or negative error code on failure.
- */
-static int ipu_init_channel(struct idmac *idmac, struct idmac_channel *ichan)
-{
- union ipu_channel_param *params = &ichan->params;
- uint32_t ipu_conf;
- enum ipu_channel channel = ichan->dma_chan.chan_id;
- unsigned long flags;
- uint32_t reg;
- struct ipu *ipu = to_ipu(idmac);
- int ret = 0, n_desc = 0;
-
- dev_dbg(ipu->dev, "init channel = %d\n", channel);
-
- if (channel != IDMAC_SDC_0 && channel != IDMAC_SDC_1 &&
- channel != IDMAC_IC_7)
- return -EINVAL;
-
- spin_lock_irqsave(&ipu->lock, flags);
-
- switch (channel) {
- case IDMAC_IC_7:
- n_desc = 16;
- reg = idmac_read_icreg(ipu, IC_CONF);
- idmac_write_icreg(ipu, reg & ~IC_CONF_CSI_MEM_WR_EN, IC_CONF);
- break;
- case IDMAC_IC_0:
- n_desc = 16;
- reg = idmac_read_ipureg(ipu, IPU_FS_PROC_FLOW);
- idmac_write_ipureg(ipu, reg & ~FS_ENC_IN_VALID, IPU_FS_PROC_FLOW);
- ret = ipu_ic_init_prpenc(ipu, params, true);
- break;
- case IDMAC_SDC_0:
- case IDMAC_SDC_1:
- n_desc = 4;
- break;
- default:
- break;
- }
-
- ipu->channel_init_mask |= 1L << channel;
-
- /* Enable IPU sub module */
- ipu_conf = idmac_read_ipureg(ipu, IPU_CONF) |
- ipu_channel_conf_mask(channel);
- idmac_write_ipureg(ipu, ipu_conf, IPU_CONF);
-
- spin_unlock_irqrestore(&ipu->lock, flags);
-
- if (n_desc && !ichan->desc)
- ret = idmac_desc_alloc(ichan, n_desc);
-
- dump_idmac_reg(ipu);
-
- return ret;
-}
-
-/**
- * ipu_uninit_channel() - uninitialize an IPU channel.
- * @idmac: IPU DMAC context.
- * @ichan: pointer to the channel object.
- */
-static void ipu_uninit_channel(struct idmac *idmac, struct idmac_channel *ichan)
-{
- enum ipu_channel channel = ichan->dma_chan.chan_id;
- unsigned long flags;
- uint32_t reg;
- unsigned long chan_mask = 1UL << channel;
- uint32_t ipu_conf;
- struct ipu *ipu = to_ipu(idmac);
-
- spin_lock_irqsave(&ipu->lock, flags);
-
- if (!(ipu->channel_init_mask & chan_mask)) {
- dev_err(ipu->dev, "Channel already uninitialized %d\n",
- channel);
- spin_unlock_irqrestore(&ipu->lock, flags);
- return;
- }
-
- /* Reset the double buffer */
- reg = idmac_read_ipureg(ipu, IPU_CHA_DB_MODE_SEL);
- idmac_write_ipureg(ipu, reg & ~chan_mask, IPU_CHA_DB_MODE_SEL);
-
- ichan->sec_chan_en = false;
-
- switch (channel) {
- case IDMAC_IC_7:
- reg = idmac_read_icreg(ipu, IC_CONF);
- idmac_write_icreg(ipu, reg & ~(IC_CONF_RWS_EN | IC_CONF_PRPENC_EN),
- IC_CONF);
- break;
- case IDMAC_IC_0:
- reg = idmac_read_icreg(ipu, IC_CONF);
- idmac_write_icreg(ipu, reg & ~(IC_CONF_PRPENC_EN | IC_CONF_PRPENC_CSC1),
- IC_CONF);
- break;
- case IDMAC_SDC_0:
- case IDMAC_SDC_1:
- default:
- break;
- }
-
- ipu->channel_init_mask &= ~(1L << channel);
-
- ipu_conf = idmac_read_ipureg(ipu, IPU_CONF) &
- ~ipu_channel_conf_mask(channel);
- idmac_write_ipureg(ipu, ipu_conf, IPU_CONF);
-
- spin_unlock_irqrestore(&ipu->lock, flags);
-
- ichan->n_tx_desc = 0;
- vfree(ichan->desc);
- ichan->desc = NULL;
-}
-
-/**
- * ipu_disable_channel() - disable an IPU channel.
- * @idmac: IPU DMAC context.
- * @ichan: channel object pointer.
- * @wait_for_stop: flag to set whether to wait for channel end of frame or
- * return immediately.
- * @return: 0 on success or negative error code on failure.
- */
-static int ipu_disable_channel(struct idmac *idmac, struct idmac_channel *ichan,
- bool wait_for_stop)
-{
- enum ipu_channel channel = ichan->dma_chan.chan_id;
- struct ipu *ipu = to_ipu(idmac);
- uint32_t reg;
- unsigned long flags;
- unsigned long chan_mask = 1UL << channel;
- unsigned int timeout;
-
- if (wait_for_stop && channel != IDMAC_SDC_1 && channel != IDMAC_SDC_0) {
- timeout = 40;
- /* This waiting always fails. Related to spurious irq problem */
- while ((idmac_read_icreg(ipu, IDMAC_CHA_BUSY) & chan_mask) ||
- (ipu_channel_status(ipu, channel) == TASK_STAT_ACTIVE)) {
- timeout--;
- msleep(10);
-
- if (!timeout) {
- dev_dbg(ipu->dev,
- "Warning: timeout waiting for channel %u to "
- "stop: buf0_rdy = 0x%08X, buf1_rdy = 0x%08X, "
- "busy = 0x%08X, tstat = 0x%08X\n", channel,
- idmac_read_ipureg(ipu, IPU_CHA_BUF0_RDY),
- idmac_read_ipureg(ipu, IPU_CHA_BUF1_RDY),
- idmac_read_icreg(ipu, IDMAC_CHA_BUSY),
- idmac_read_ipureg(ipu, IPU_TASKS_STAT));
- break;
- }
- }
- dev_dbg(ipu->dev, "timeout = %d * 10ms\n", 40 - timeout);
- }
- /* SDC BG and FG must be disabled before DMA is disabled */
- if (wait_for_stop && (channel == IDMAC_SDC_0 ||
- channel == IDMAC_SDC_1)) {
- for (timeout = 5;
- timeout && !ipu_irq_status(ichan->eof_irq); timeout--)
- msleep(5);
- }
-
- spin_lock_irqsave(&ipu->lock, flags);
-
- /* Disable IC task */
- ipu_ic_disable_task(ipu, channel);
-
- /* Disable DMA channel(s) */
- reg = idmac_read_icreg(ipu, IDMAC_CHA_EN);
- idmac_write_icreg(ipu, reg & ~chan_mask, IDMAC_CHA_EN);
-
- spin_unlock_irqrestore(&ipu->lock, flags);
-
- return 0;
-}
-
-static struct scatterlist *idmac_sg_next(struct idmac_channel *ichan,
- struct idmac_tx_desc **desc, struct scatterlist *sg)
-{
- struct scatterlist *sgnew = sg ? sg_next(sg) : NULL;
-
- if (sgnew)
- /* next sg-element in this list */
- return sgnew;
-
- if ((*desc)->list.next == &ichan->queue)
- /* No more descriptors on the queue */
- return NULL;
-
- /* Fetch next descriptor */
- *desc = list_entry((*desc)->list.next, struct idmac_tx_desc, list);
- return (*desc)->sg;
-}
-
-/*
- * We have several possibilities here:
- * current BUF next BUF
- *
- * not last sg next not last sg
- * not last sg next last sg
- * last sg first sg from next descriptor
- * last sg NULL
- *
- * Besides, the descriptor queue might be empty or not. We process all these
- * cases carefully.
- */
-static irqreturn_t idmac_interrupt(int irq, void *dev_id)
-{
- struct idmac_channel *ichan = dev_id;
- struct device *dev = &ichan->dma_chan.dev->device;
- unsigned int chan_id = ichan->dma_chan.chan_id;
- struct scatterlist **sg, *sgnext, *sgnew = NULL;
- /* Next transfer descriptor */
- struct idmac_tx_desc *desc, *descnew;
- bool done = false;
- u32 ready0, ready1, curbuf, err;
- struct dmaengine_desc_callback cb;
-
- /* IDMAC has cleared the respective BUFx_RDY bit, we manage the buffer */
-
- dev_dbg(dev, "IDMAC irq %d, buf %d\n", irq, ichan->active_buffer);
-
- spin_lock(&ipu_data.lock);
-
- ready0 = idmac_read_ipureg(&ipu_data, IPU_CHA_BUF0_RDY);
- ready1 = idmac_read_ipureg(&ipu_data, IPU_CHA_BUF1_RDY);
- curbuf = idmac_read_ipureg(&ipu_data, IPU_CHA_CUR_BUF);
- err = idmac_read_ipureg(&ipu_data, IPU_INT_STAT_4);
-
- if (err & (1 << chan_id)) {
- idmac_write_ipureg(&ipu_data, 1 << chan_id, IPU_INT_STAT_4);
- spin_unlock(&ipu_data.lock);
- /*
- * Doing this
- * ichan->sg[0] = ichan->sg[1] = NULL;
- * you can force channel re-enable on the next tx_submit(), but
- * this is dirty - think about descriptors with multiple
- * sg elements.
- */
- dev_warn(dev, "NFB4EOF on channel %d, ready %x, %x, cur %x\n",
- chan_id, ready0, ready1, curbuf);
- return IRQ_HANDLED;
- }
- spin_unlock(&ipu_data.lock);
-
- /* Other interrupts do not interfere with this channel */
- spin_lock(&ichan->lock);
- if (unlikely((ichan->active_buffer && (ready1 >> chan_id) & 1) ||
- (!ichan->active_buffer && (ready0 >> chan_id) & 1)
- )) {
- spin_unlock(&ichan->lock);
- dev_dbg(dev,
- "IRQ with active buffer still ready on channel %x, "
- "active %d, ready %x, %x!\n", chan_id,
- ichan->active_buffer, ready0, ready1);
- return IRQ_NONE;
- }
-
- if (unlikely(list_empty(&ichan->queue))) {
- ichan->sg[ichan->active_buffer] = NULL;
- spin_unlock(&ichan->lock);
- dev_err(dev,
- "IRQ without queued buffers on channel %x, active %d, "
- "ready %x, %x!\n", chan_id,
- ichan->active_buffer, ready0, ready1);
- return IRQ_NONE;
- }
-
- /*
- * active_buffer is a software flag, it shows which buffer we are
- * currently expecting back from the hardware, IDMAC should be
- * processing the other buffer already
- */
- sg = &ichan->sg[ichan->active_buffer];
- sgnext = ichan->sg[!ichan->active_buffer];
-
- if (!*sg) {
- spin_unlock(&ichan->lock);
- return IRQ_HANDLED;
- }
-
- desc = list_entry(ichan->queue.next, struct idmac_tx_desc, list);
- descnew = desc;
-
- dev_dbg(dev, "IDMAC irq %d, dma %#llx, next dma %#llx, current %d, curbuf %#x\n",
- irq, (u64)sg_dma_address(*sg),
- sgnext ? (u64)sg_dma_address(sgnext) : 0,
- ichan->active_buffer, curbuf);
-
- /* Find the descriptor of sgnext */
- sgnew = idmac_sg_next(ichan, &descnew, *sg);
- if (sgnext != sgnew)
- dev_err(dev, "Submitted buffer %p, next buffer %p\n", sgnext, sgnew);
-
- /*
- * if sgnext == NULL sg must be the last element in a scatterlist and
- * queue must be empty
- */
- if (unlikely(!sgnext)) {
- if (!WARN_ON(sg_next(*sg)))
- dev_dbg(dev, "Underrun on channel %x\n", chan_id);
- ichan->sg[!ichan->active_buffer] = sgnew;
-
- if (unlikely(sgnew)) {
- ipu_submit_buffer(ichan, descnew, sgnew, !ichan->active_buffer);
- } else {
- spin_lock(&ipu_data.lock);
- ipu_ic_disable_task(&ipu_data, chan_id);
- spin_unlock(&ipu_data.lock);
- ichan->status = IPU_CHANNEL_READY;
- /* Continue to check for complete descriptor */
- }
- }
-
- /* Calculate and submit the next sg element */
- sgnew = idmac_sg_next(ichan, &descnew, sgnew);
-
- if (unlikely(!sg_next(*sg)) || !sgnext) {
- /*
- * Last element in scatterlist done, remove from the queue,
- * _init for debugging
- */
- list_del_init(&desc->list);
- done = true;
- }
-
- *sg = sgnew;
-
- if (likely(sgnew) &&
- ipu_submit_buffer(ichan, descnew, sgnew, ichan->active_buffer) < 0) {
- dmaengine_desc_get_callback(&descnew->txd, &cb);
-
- list_del_init(&descnew->list);
- spin_unlock(&ichan->lock);
-
- dmaengine_desc_callback_invoke(&cb, NULL);
- spin_lock(&ichan->lock);
- }
-
- /* Flip the active buffer - even if update above failed */
- ichan->active_buffer = !ichan->active_buffer;
- if (done)
- dma_cookie_complete(&desc->txd);
-
- dmaengine_desc_get_callback(&desc->txd, &cb);
-
- spin_unlock(&ichan->lock);
-
- if (done && (desc->txd.flags & DMA_PREP_INTERRUPT))
- dmaengine_desc_callback_invoke(&cb, NULL);
-
- return IRQ_HANDLED;
-}
-
-static void ipu_gc_tasklet(struct tasklet_struct *t)
-{
- struct ipu *ipu = from_tasklet(ipu, t, tasklet);
- int i;
-
- for (i = 0; i < IPU_CHANNELS_NUM; i++) {
- struct idmac_channel *ichan = ipu->channel + i;
- struct idmac_tx_desc *desc;
- unsigned long flags;
- struct scatterlist *sg;
- int j, k;
-
- for (j = 0; j < ichan->n_tx_desc; j++) {
- desc = ichan->desc + j;
- spin_lock_irqsave(&ichan->lock, flags);
- if (async_tx_test_ack(&desc->txd)) {
- list_move(&desc->list, &ichan->free_list);
- for_each_sg(desc->sg, sg, desc->sg_len, k) {
- if (ichan->sg[0] == sg)
- ichan->sg[0] = NULL;
- else if (ichan->sg[1] == sg)
- ichan->sg[1] = NULL;
- }
- async_tx_clear_ack(&desc->txd);
- }
- spin_unlock_irqrestore(&ichan->lock, flags);
- }
- }
-}
-
-/* Allocate and initialise a transfer descriptor. */
-static struct dma_async_tx_descriptor *idmac_prep_slave_sg(struct dma_chan *chan,
- struct scatterlist *sgl, unsigned int sg_len,
- enum dma_transfer_direction direction, unsigned long tx_flags,
- void *context)
-{
- struct idmac_channel *ichan = to_idmac_chan(chan);
- struct idmac_tx_desc *desc = NULL;
- struct dma_async_tx_descriptor *txd = NULL;
- unsigned long flags;
-
- /* We only can handle these three channels so far */
- if (chan->chan_id != IDMAC_SDC_0 && chan->chan_id != IDMAC_SDC_1 &&
- chan->chan_id != IDMAC_IC_7)
- return NULL;
-
- if (!is_slave_direction(direction)) {
- dev_err(chan->device->dev, "Invalid DMA direction %d!\n", direction);
- return NULL;
- }
-
- mutex_lock(&ichan->chan_mutex);
-
- spin_lock_irqsave(&ichan->lock, flags);
- if (!list_empty(&ichan->free_list)) {
- desc = list_entry(ichan->free_list.next,
- struct idmac_tx_desc, list);
-
- list_del_init(&desc->list);
-
- desc->sg_len = sg_len;
- desc->sg = sgl;
- txd = &desc->txd;
- txd->flags = tx_flags;
- }
- spin_unlock_irqrestore(&ichan->lock, flags);
-
- mutex_unlock(&ichan->chan_mutex);
-
- tasklet_schedule(&to_ipu(to_idmac(chan->device))->tasklet);
-
- return txd;
-}
-
-/* Re-select the current buffer and re-activate the channel */
-static void idmac_issue_pending(struct dma_chan *chan)
-{
- struct idmac_channel *ichan = to_idmac_chan(chan);
- struct idmac *idmac = to_idmac(chan->device);
- struct ipu *ipu = to_ipu(idmac);
- unsigned long flags;
-
- /* This is not always needed, but doesn't hurt either */
- spin_lock_irqsave(&ipu->lock, flags);
- ipu_select_buffer(chan->chan_id, ichan->active_buffer);
- spin_unlock_irqrestore(&ipu->lock, flags);
-
- /*
- * Might need to perform some parts of initialisation from
- * ipu_enable_channel(), but not all, we do not want to reset to buffer
- * 0, don't need to set priority again either, but re-enabling the task
- * and the channel might be a good idea.
- */
-}
-
-static int idmac_pause(struct dma_chan *chan)
-{
- struct idmac_channel *ichan = to_idmac_chan(chan);
- struct idmac *idmac = to_idmac(chan->device);
- struct ipu *ipu = to_ipu(idmac);
- struct list_head *list, *tmp;
- unsigned long flags;
-
- mutex_lock(&ichan->chan_mutex);
-
- spin_lock_irqsave(&ipu->lock, flags);
- ipu_ic_disable_task(ipu, chan->chan_id);
-
- /* Return all descriptors into "prepared" state */
- list_for_each_safe(list, tmp, &ichan->queue)
- list_del_init(list);
-
- ichan->sg[0] = NULL;
- ichan->sg[1] = NULL;
-
- spin_unlock_irqrestore(&ipu->lock, flags);
-
- ichan->status = IPU_CHANNEL_INITIALIZED;
-
- mutex_unlock(&ichan->chan_mutex);
-
- return 0;
-}
-
-static int __idmac_terminate_all(struct dma_chan *chan)
-{
- struct idmac_channel *ichan = to_idmac_chan(chan);
- struct idmac *idmac = to_idmac(chan->device);
- struct ipu *ipu = to_ipu(idmac);
- unsigned long flags;
- int i;
-
- ipu_disable_channel(idmac, ichan,
- ichan->status >= IPU_CHANNEL_ENABLED);
-
- tasklet_disable(&ipu->tasklet);
-
- /* ichan->queue is modified in ISR, have to spinlock */
- spin_lock_irqsave(&ichan->lock, flags);
- list_splice_init(&ichan->queue, &ichan->free_list);
-
- if (ichan->desc)
- for (i = 0; i < ichan->n_tx_desc; i++) {
- struct idmac_tx_desc *desc = ichan->desc + i;
- if (list_empty(&desc->list))
- /* Descriptor was prepared, but not submitted */
- list_add(&desc->list, &ichan->free_list);
-
- async_tx_clear_ack(&desc->txd);
- }
-
- ichan->sg[0] = NULL;
- ichan->sg[1] = NULL;
- spin_unlock_irqrestore(&ichan->lock, flags);
-
- tasklet_enable(&ipu->tasklet);
-
- ichan->status = IPU_CHANNEL_INITIALIZED;
-
- return 0;
-}
-
-static int idmac_terminate_all(struct dma_chan *chan)
-{
- struct idmac_channel *ichan = to_idmac_chan(chan);
- int ret;
-
- mutex_lock(&ichan->chan_mutex);
-
- ret = __idmac_terminate_all(chan);
-
- mutex_unlock(&ichan->chan_mutex);
-
- return ret;
-}
-
-#ifdef DEBUG
-static irqreturn_t ic_sof_irq(int irq, void *dev_id)
-{
- struct idmac_channel *ichan = dev_id;
- printk(KERN_DEBUG "Got SOF IRQ %d on Channel %d\n",
- irq, ichan->dma_chan.chan_id);
- disable_irq_nosync(irq);
- return IRQ_HANDLED;
-}
-
-static irqreturn_t ic_eof_irq(int irq, void *dev_id)
-{
- struct idmac_channel *ichan = dev_id;
- printk(KERN_DEBUG "Got EOF IRQ %d on Channel %d\n",
- irq, ichan->dma_chan.chan_id);
- disable_irq_nosync(irq);
- return IRQ_HANDLED;
-}
-
-static int ic_sof = -EINVAL, ic_eof = -EINVAL;
-#endif
-
-static int idmac_alloc_chan_resources(struct dma_chan *chan)
-{
- struct idmac_channel *ichan = to_idmac_chan(chan);
- struct idmac *idmac = to_idmac(chan->device);
- int ret;
-
- /* dmaengine.c now guarantees to only offer free channels */
- BUG_ON(chan->client_count > 1);
- WARN_ON(ichan->status != IPU_CHANNEL_FREE);
-
- dma_cookie_init(chan);
-
- ret = ipu_irq_map(chan->chan_id);
- if (ret < 0)
- goto eimap;
-
- ichan->eof_irq = ret;
-
- /*
- * Important to first disable the channel, because maybe someone
- * used it before us, e.g., the bootloader
- */
- ipu_disable_channel(idmac, ichan, true);
-
- ret = ipu_init_channel(idmac, ichan);
- if (ret < 0)
- goto eichan;
-
- ret = request_irq(ichan->eof_irq, idmac_interrupt, 0,
- ichan->eof_name, ichan);
- if (ret < 0)
- goto erirq;
-
-#ifdef DEBUG
- if (chan->chan_id == IDMAC_IC_7) {
- ic_sof = ipu_irq_map(69);
- if (ic_sof > 0) {
- ret = request_irq(ic_sof, ic_sof_irq, 0, "IC SOF", ichan);
- if (ret)
- dev_err(&chan->dev->device, "request irq failed for IC SOF");
- }
- ic_eof = ipu_irq_map(70);
- if (ic_eof > 0) {
- ret = request_irq(ic_eof, ic_eof_irq, 0, "IC EOF", ichan);
- if (ret)
- dev_err(&chan->dev->device, "request irq failed for IC EOF");
- }
- }
-#endif
-
- ichan->status = IPU_CHANNEL_INITIALIZED;
-
- dev_dbg(&chan->dev->device, "Found channel 0x%x, irq %d\n",
- chan->chan_id, ichan->eof_irq);
-
- return ret;
-
-erirq:
- ipu_uninit_channel(idmac, ichan);
-eichan:
- ipu_irq_unmap(chan->chan_id);
-eimap:
- return ret;
-}
-
-static void idmac_free_chan_resources(struct dma_chan *chan)
-{
- struct idmac_channel *ichan = to_idmac_chan(chan);
- struct idmac *idmac = to_idmac(chan->device);
-
- mutex_lock(&ichan->chan_mutex);
-
- __idmac_terminate_all(chan);
-
- if (ichan->status > IPU_CHANNEL_FREE) {
-#ifdef DEBUG
- if (chan->chan_id == IDMAC_IC_7) {
- if (ic_sof > 0) {
- free_irq(ic_sof, ichan);
- ipu_irq_unmap(69);
- ic_sof = -EINVAL;
- }
- if (ic_eof > 0) {
- free_irq(ic_eof, ichan);
- ipu_irq_unmap(70);
- ic_eof = -EINVAL;
- }
- }
-#endif
- free_irq(ichan->eof_irq, ichan);
- ipu_irq_unmap(chan->chan_id);
- }
-
- ichan->status = IPU_CHANNEL_FREE;
-
- ipu_uninit_channel(idmac, ichan);
-
- mutex_unlock(&ichan->chan_mutex);
-
- tasklet_schedule(&to_ipu(idmac)->tasklet);
-}
-
-static enum dma_status idmac_tx_status(struct dma_chan *chan,
- dma_cookie_t cookie, struct dma_tx_state *txstate)
-{
- return dma_cookie_status(chan, cookie, txstate);
-}
-
-static int __init ipu_idmac_init(struct ipu *ipu)
-{
- struct idmac *idmac = &ipu->idmac;
- struct dma_device *dma = &idmac->dma;
- int i;
-
- dma_cap_set(DMA_SLAVE, dma->cap_mask);
- dma_cap_set(DMA_PRIVATE, dma->cap_mask);
-
- /* Compulsory common fields */
- dma->dev = ipu->dev;
- dma->device_alloc_chan_resources = idmac_alloc_chan_resources;
- dma->device_free_chan_resources = idmac_free_chan_resources;
- dma->device_tx_status = idmac_tx_status;
- dma->device_issue_pending = idmac_issue_pending;
-
- /* Compulsory for DMA_SLAVE fields */
- dma->device_prep_slave_sg = idmac_prep_slave_sg;
- dma->device_pause = idmac_pause;
- dma->device_terminate_all = idmac_terminate_all;
-
- INIT_LIST_HEAD(&dma->channels);
- for (i = 0; i < IPU_CHANNELS_NUM; i++) {
- struct idmac_channel *ichan = ipu->channel + i;
- struct dma_chan *dma_chan = &ichan->dma_chan;
-
- spin_lock_init(&ichan->lock);
- mutex_init(&ichan->chan_mutex);
-
- ichan->status = IPU_CHANNEL_FREE;
- ichan->sec_chan_en = false;
- snprintf(ichan->eof_name, sizeof(ichan->eof_name), "IDMAC EOF %d", i);
-
- dma_chan->device = &idmac->dma;
- dma_cookie_init(dma_chan);
- dma_chan->chan_id = i;
- list_add_tail(&dma_chan->device_node, &dma->channels);
- }
-
- idmac_write_icreg(ipu, 0x00000070, IDMAC_CONF);
-
- return dma_async_device_register(&idmac->dma);
-}
-
-static void ipu_idmac_exit(struct ipu *ipu)
-{
- int i;
- struct idmac *idmac = &ipu->idmac;
-
- for (i = 0; i < IPU_CHANNELS_NUM; i++) {
- struct idmac_channel *ichan = ipu->channel + i;
-
- idmac_terminate_all(&ichan->dma_chan);
- }
-
- dma_async_device_unregister(&idmac->dma);
-}
-
-/*****************************************************************************
- * IPU common probe / remove
- */
-
-static int __init ipu_probe(struct platform_device *pdev)
-{
- struct resource *mem_ipu, *mem_ic;
- int ret;
-
- spin_lock_init(&ipu_data.lock);
-
- mem_ipu = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- mem_ic = platform_get_resource(pdev, IORESOURCE_MEM, 1);
- if (!mem_ipu || !mem_ic)
- return -EINVAL;
-
- ipu_data.dev = &pdev->dev;
-
- platform_set_drvdata(pdev, &ipu_data);
-
- ret = platform_get_irq(pdev, 0);
- if (ret < 0)
- goto err_noirq;
-
- ipu_data.irq_fn = ret;
- ret = platform_get_irq(pdev, 1);
- if (ret < 0)
- goto err_noirq;
-
- ipu_data.irq_err = ret;
-
- dev_dbg(&pdev->dev, "fn irq %u, err irq %u\n",
- ipu_data.irq_fn, ipu_data.irq_err);
-
- /* Remap IPU common registers */
- ipu_data.reg_ipu = ioremap(mem_ipu->start, resource_size(mem_ipu));
- if (!ipu_data.reg_ipu) {
- ret = -ENOMEM;
- goto err_ioremap_ipu;
- }
-
- /* Remap Image Converter and Image DMA Controller registers */
- ipu_data.reg_ic = ioremap(mem_ic->start, resource_size(mem_ic));
- if (!ipu_data.reg_ic) {
- ret = -ENOMEM;
- goto err_ioremap_ic;
- }
-
- /* Get IPU clock */
- ipu_data.ipu_clk = clk_get(&pdev->dev, NULL);
- if (IS_ERR(ipu_data.ipu_clk)) {
- ret = PTR_ERR(ipu_data.ipu_clk);
- goto err_clk_get;
- }
-
- /* Make sure IPU HSP clock is running */
- clk_prepare_enable(ipu_data.ipu_clk);
-
- /* Disable all interrupts */
- idmac_write_ipureg(&ipu_data, 0, IPU_INT_CTRL_1);
- idmac_write_ipureg(&ipu_data, 0, IPU_INT_CTRL_2);
- idmac_write_ipureg(&ipu_data, 0, IPU_INT_CTRL_3);
- idmac_write_ipureg(&ipu_data, 0, IPU_INT_CTRL_4);
- idmac_write_ipureg(&ipu_data, 0, IPU_INT_CTRL_5);
-
- dev_dbg(&pdev->dev, "%s @ 0x%08lx, fn irq %u, err irq %u\n", pdev->name,
- (unsigned long)mem_ipu->start, ipu_data.irq_fn, ipu_data.irq_err);
-
- ret = ipu_irq_attach_irq(&ipu_data, pdev);
- if (ret < 0)
- goto err_attach_irq;
-
- /* Initialize DMA engine */
- ret = ipu_idmac_init(&ipu_data);
- if (ret < 0)
- goto err_idmac_init;
-
- tasklet_setup(&ipu_data.tasklet, ipu_gc_tasklet);
-
- ipu_data.dev = &pdev->dev;
-
- dev_dbg(ipu_data.dev, "IPU initialized\n");
-
- return 0;
-
-err_idmac_init:
-err_attach_irq:
- ipu_irq_detach_irq(&ipu_data, pdev);
- clk_disable_unprepare(ipu_data.ipu_clk);
- clk_put(ipu_data.ipu_clk);
-err_clk_get:
- iounmap(ipu_data.reg_ic);
-err_ioremap_ic:
- iounmap(ipu_data.reg_ipu);
-err_ioremap_ipu:
-err_noirq:
- dev_err(&pdev->dev, "Failed to probe IPU: %d\n", ret);
- return ret;
-}
-
-static int ipu_remove(struct platform_device *pdev)
-{
- struct ipu *ipu = platform_get_drvdata(pdev);
-
- ipu_idmac_exit(ipu);
- ipu_irq_detach_irq(ipu, pdev);
- clk_disable_unprepare(ipu->ipu_clk);
- clk_put(ipu->ipu_clk);
- iounmap(ipu->reg_ic);
- iounmap(ipu->reg_ipu);
- tasklet_kill(&ipu->tasklet);
-
- return 0;
-}
-
-/*
- * We need two MEM resources - with IPU-common and Image Converter registers,
- * including PF_CONF and IDMAC_* registers, and two IRQs - function and error
- */
-static struct platform_driver ipu_platform_driver = {
- .driver = {
- .name = "ipu-core",
- },
- .remove = ipu_remove,
-};
-
-static int __init ipu_init(void)
-{
- return platform_driver_probe(&ipu_platform_driver, ipu_probe);
-}
-subsys_initcall(ipu_init);
-
-MODULE_DESCRIPTION("IPU core driver");
-MODULE_AUTHOR("Guennadi Liakhovetski <lg@denx.de>");
-MODULE_ALIAS("platform:ipu-core");
projects / platform / kernel / linux-starfive.git / commitdiff