+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0+
-/*
- * isp1301_omap - ISP 1301 USB transceiver, talking to OMAP OTG controller
- *
- * Copyright (C) 2004 Texas Instruments
- * Copyright (C) 2004 David Brownell
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/slab.h>
-#include <linux/interrupt.h>
-#include <linux/platform_device.h>
-#include <linux/gpio/consumer.h>
-#include <linux/usb/ch9.h>
-#include <linux/usb/gadget.h>
-#include <linux/usb.h>
-#include <linux/usb/otg.h>
-#include <linux/i2c.h>
-#include <linux/workqueue.h>
-
-#include <asm/irq.h>
-#include <asm/mach-types.h>
-
-#include <linux/soc/ti/omap1-mux.h>
-#include <linux/soc/ti/omap1-usb.h>
-#include <linux/soc/ti/omap1-io.h>
-
-#undef VERBOSE
-
-
-#define DRIVER_VERSION "24 August 2004"
-#define DRIVER_NAME (isp1301_driver.driver.name)
-
-MODULE_DESCRIPTION("ISP1301 USB OTG Transceiver Driver");
-MODULE_LICENSE("GPL");
-
-struct isp1301 {
- struct usb_phy phy;
- struct i2c_client *client;
- void (*i2c_release)(struct device *dev);
-
- int irq_type;
-
- u32 last_otg_ctrl;
- unsigned working:1;
-
- struct timer_list timer;
-
- /* use keventd context to change the state for us */
- struct work_struct work;
-
- unsigned long todo;
-# define WORK_UPDATE_ISP 0 /* update ISP from OTG */
-# define WORK_UPDATE_OTG 1 /* update OTG from ISP */
-# define WORK_HOST_RESUME 4 /* resume host */
-# define WORK_TIMER 6 /* timer fired */
-# define WORK_STOP 7 /* don't resubmit */
-};
-
-
-/* bits in OTG_CTRL */
-
-#define OTG_XCEIV_OUTPUTS \
- (OTG_ASESSVLD|OTG_BSESSEND|OTG_BSESSVLD|OTG_VBUSVLD|OTG_ID)
-#define OTG_XCEIV_INPUTS \
- (OTG_PULLDOWN|OTG_PULLUP|OTG_DRV_VBUS|OTG_PD_VBUS|OTG_PU_VBUS|OTG_PU_ID)
-#define OTG_CTRL_BITS \
- (OTG_A_BUSREQ|OTG_A_SETB_HNPEN|OTG_B_BUSREQ|OTG_B_HNPEN|OTG_BUSDROP)
- /* and OTG_PULLUP is sometimes written */
-
-#define OTG_CTRL_MASK (OTG_DRIVER_SEL| \
- OTG_XCEIV_OUTPUTS|OTG_XCEIV_INPUTS| \
- OTG_CTRL_BITS)
-
-
-/*-------------------------------------------------------------------------*/
-
-/* products will deliver OTG messages with LEDs, GUI, etc */
-static inline void notresponding(struct isp1301 *isp)
-{
- printk(KERN_NOTICE "OTG device not responding.\n");
-}
-
-
-/*-------------------------------------------------------------------------*/
-
-static struct i2c_driver isp1301_driver;
-
-/* smbus apis are used for portability */
-
-static inline u8
-isp1301_get_u8(struct isp1301 *isp, u8 reg)
-{
- return i2c_smbus_read_byte_data(isp->client, reg + 0);
-}
-
-static inline int
-isp1301_get_u16(struct isp1301 *isp, u8 reg)
-{
- return i2c_smbus_read_word_data(isp->client, reg);
-}
-
-static inline int
-isp1301_set_bits(struct isp1301 *isp, u8 reg, u8 bits)
-{
- return i2c_smbus_write_byte_data(isp->client, reg + 0, bits);
-}
-
-static inline int
-isp1301_clear_bits(struct isp1301 *isp, u8 reg, u8 bits)
-{
- return i2c_smbus_write_byte_data(isp->client, reg + 1, bits);
-}
-
-/*-------------------------------------------------------------------------*/
-
-/* identification */
-#define ISP1301_VENDOR_ID 0x00 /* u16 read */
-#define ISP1301_PRODUCT_ID 0x02 /* u16 read */
-#define ISP1301_BCD_DEVICE 0x14 /* u16 read */
-
-#define I2C_VENDOR_ID_PHILIPS 0x04cc
-#define I2C_PRODUCT_ID_PHILIPS_1301 0x1301
-
-/* operational registers */
-#define ISP1301_MODE_CONTROL_1 0x04 /* u8 read, set, +1 clear */
-# define MC1_SPEED (1 << 0)
-# define MC1_SUSPEND (1 << 1)
-# define MC1_DAT_SE0 (1 << 2)
-# define MC1_TRANSPARENT (1 << 3)
-# define MC1_BDIS_ACON_EN (1 << 4)
-# define MC1_OE_INT_EN (1 << 5)
-# define MC1_UART_EN (1 << 6)
-# define MC1_MASK 0x7f
-#define ISP1301_MODE_CONTROL_2 0x12 /* u8 read, set, +1 clear */
-# define MC2_GLOBAL_PWR_DN (1 << 0)
-# define MC2_SPD_SUSP_CTRL (1 << 1)
-# define MC2_BI_DI (1 << 2)
-# define MC2_TRANSP_BDIR0 (1 << 3)
-# define MC2_TRANSP_BDIR1 (1 << 4)
-# define MC2_AUDIO_EN (1 << 5)
-# define MC2_PSW_EN (1 << 6)
-# define MC2_EN2V7 (1 << 7)
-#define ISP1301_OTG_CONTROL_1 0x06 /* u8 read, set, +1 clear */
-# define OTG1_DP_PULLUP (1 << 0)
-# define OTG1_DM_PULLUP (1 << 1)
-# define OTG1_DP_PULLDOWN (1 << 2)
-# define OTG1_DM_PULLDOWN (1 << 3)
-# define OTG1_ID_PULLDOWN (1 << 4)
-# define OTG1_VBUS_DRV (1 << 5)
-# define OTG1_VBUS_DISCHRG (1 << 6)
-# define OTG1_VBUS_CHRG (1 << 7)
-#define ISP1301_OTG_STATUS 0x10 /* u8 readonly */
-# define OTG_B_SESS_END (1 << 6)
-# define OTG_B_SESS_VLD (1 << 7)
-
-#define ISP1301_INTERRUPT_SOURCE 0x08 /* u8 read */
-#define ISP1301_INTERRUPT_LATCH 0x0A /* u8 read, set, +1 clear */
-
-#define ISP1301_INTERRUPT_FALLING 0x0C /* u8 read, set, +1 clear */
-#define ISP1301_INTERRUPT_RISING 0x0E /* u8 read, set, +1 clear */
-
-/* same bitfields in all interrupt registers */
-# define INTR_VBUS_VLD (1 << 0)
-# define INTR_SESS_VLD (1 << 1)
-# define INTR_DP_HI (1 << 2)
-# define INTR_ID_GND (1 << 3)
-# define INTR_DM_HI (1 << 4)
-# define INTR_ID_FLOAT (1 << 5)
-# define INTR_BDIS_ACON (1 << 6)
-# define INTR_CR_INT (1 << 7)
-
-/*-------------------------------------------------------------------------*/
-
-static inline const char *state_name(struct isp1301 *isp)
-{
- return usb_otg_state_string(isp->phy.otg->state);
-}
-
-/*-------------------------------------------------------------------------*/
-
-/* NOTE: some of this ISP1301 setup is specific to H2 boards;
- * not everything is guarded by board-specific checks, or even using
- * omap_usb_config data to deduce MC1_DAT_SE0 and MC2_BI_DI.
- *
- * ALSO: this currently doesn't use ISP1301 low-power modes
- * while OTG is running.
- */
-
-static void power_down(struct isp1301 *isp)
-{
- isp->phy.otg->state = OTG_STATE_UNDEFINED;
-
- // isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, MC2_GLOBAL_PWR_DN);
- isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_SUSPEND);
-
- isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_ID_PULLDOWN);
- isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0);
-}
-
-static void __maybe_unused power_up(struct isp1301 *isp)
-{
- // isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_2, MC2_GLOBAL_PWR_DN);
- isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_SUSPEND);
-
- /* do this only when cpu is driving transceiver,
- * so host won't see a low speed device...
- */
- isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0);
-}
-
-#define NO_HOST_SUSPEND
-
-static int host_suspend(struct isp1301 *isp)
-{
-#ifdef NO_HOST_SUSPEND
- return 0;
-#else
- struct device *dev;
-
- if (!isp->phy.otg->host)
- return -ENODEV;
-
- /* Currently ASSUMES only the OTG port matters;
- * other ports could be active...
- */
- dev = isp->phy.otg->host->controller;
- return dev->driver->suspend(dev, 3, 0);
-#endif
-}
-
-static int host_resume(struct isp1301 *isp)
-{
-#ifdef NO_HOST_SUSPEND
- return 0;
-#else
- struct device *dev;
-
- if (!isp->phy.otg->host)
- return -ENODEV;
-
- dev = isp->phy.otg->host->controller;
- return dev->driver->resume(dev, 0);
-#endif
-}
-
-static int gadget_suspend(struct isp1301 *isp)
-{
- isp->phy.otg->gadget->b_hnp_enable = 0;
- isp->phy.otg->gadget->a_hnp_support = 0;
- isp->phy.otg->gadget->a_alt_hnp_support = 0;
- return usb_gadget_vbus_disconnect(isp->phy.otg->gadget);
-}
-
-/*-------------------------------------------------------------------------*/
-
-#define TIMER_MINUTES 10
-#define TIMER_JIFFIES (TIMER_MINUTES * 60 * HZ)
-
-/* Almost all our I2C messaging comes from a work queue's task context.
- * NOTE: guaranteeing certain response times might mean we shouldn't
- * share keventd's work queue; a realtime task might be safest.
- */
-static void isp1301_defer_work(struct isp1301 *isp, int work)
-{
- int status;
-
- if (isp && !test_and_set_bit(work, &isp->todo)) {
- (void) get_device(&isp->client->dev);
- status = schedule_work(&isp->work);
- if (!status && !isp->working)
- dev_vdbg(&isp->client->dev,
- "work item %d may be lost\n", work);
- }
-}
-
-/* called from irq handlers */
-static void a_idle(struct isp1301 *isp, const char *tag)
-{
- u32 l;
-
- if (isp->phy.otg->state == OTG_STATE_A_IDLE)
- return;
-
- isp->phy.otg->default_a = 1;
- if (isp->phy.otg->host) {
- isp->phy.otg->host->is_b_host = 0;
- host_suspend(isp);
- }
- if (isp->phy.otg->gadget) {
- isp->phy.otg->gadget->is_a_peripheral = 1;
- gadget_suspend(isp);
- }
- isp->phy.otg->state = OTG_STATE_A_IDLE;
- l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS;
- omap_writel(l, OTG_CTRL);
- isp->last_otg_ctrl = l;
- pr_debug(" --> %s/%s\n", state_name(isp), tag);
-}
-
-/* called from irq handlers */
-static void b_idle(struct isp1301 *isp, const char *tag)
-{
- u32 l;
-
- if (isp->phy.otg->state == OTG_STATE_B_IDLE)
- return;
-
- isp->phy.otg->default_a = 0;
- if (isp->phy.otg->host) {
- isp->phy.otg->host->is_b_host = 1;
- host_suspend(isp);
- }
- if (isp->phy.otg->gadget) {
- isp->phy.otg->gadget->is_a_peripheral = 0;
- gadget_suspend(isp);
- }
- isp->phy.otg->state = OTG_STATE_B_IDLE;
- l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS;
- omap_writel(l, OTG_CTRL);
- isp->last_otg_ctrl = l;
- pr_debug(" --> %s/%s\n", state_name(isp), tag);
-}
-
-static void
-dump_regs(struct isp1301 *isp, const char *label)
-{
- u8 ctrl = isp1301_get_u8(isp, ISP1301_OTG_CONTROL_1);
- u8 status = isp1301_get_u8(isp, ISP1301_OTG_STATUS);
- u8 src = isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE);
-
- pr_debug("otg: %06x, %s %s, otg/%02x stat/%02x.%02x\n",
- omap_readl(OTG_CTRL), label, state_name(isp),
- ctrl, status, src);
- /* mode control and irq enables don't change much */
-}
-
-/*-------------------------------------------------------------------------*/
-
-#ifdef CONFIG_USB_OTG
-
-/*
- * The OMAP OTG controller handles most of the OTG state transitions.
- *
- * We translate isp1301 outputs (mostly voltage comparator status) into
- * OTG inputs; OTG outputs (mostly pullup/pulldown controls) and HNP state
- * flags into isp1301 inputs ... and infer state transitions.
- */
-
-#ifdef VERBOSE
-
-static void check_state(struct isp1301 *isp, const char *tag)
-{
- enum usb_otg_state state = OTG_STATE_UNDEFINED;
- u8 fsm = omap_readw(OTG_TEST) & 0x0ff;
- unsigned extra = 0;
-
- switch (fsm) {
-
- /* default-b */
- case 0x0:
- state = OTG_STATE_B_IDLE;
- break;
- case 0x3:
- case 0x7:
- extra = 1;
- case 0x1:
- state = OTG_STATE_B_PERIPHERAL;
- break;
- case 0x11:
- state = OTG_STATE_B_SRP_INIT;
- break;
-
- /* extra dual-role default-b states */
- case 0x12:
- case 0x13:
- case 0x16:
- extra = 1;
- case 0x17:
- state = OTG_STATE_B_WAIT_ACON;
- break;
- case 0x34:
- state = OTG_STATE_B_HOST;
- break;
-
- /* default-a */
- case 0x36:
- state = OTG_STATE_A_IDLE;
- break;
- case 0x3c:
- state = OTG_STATE_A_WAIT_VFALL;
- break;
- case 0x7d:
- state = OTG_STATE_A_VBUS_ERR;
- break;
- case 0x9e:
- case 0x9f:
- extra = 1;
- case 0x89:
- state = OTG_STATE_A_PERIPHERAL;
- break;
- case 0xb7:
- state = OTG_STATE_A_WAIT_VRISE;
- break;
- case 0xb8:
- state = OTG_STATE_A_WAIT_BCON;
- break;
- case 0xb9:
- state = OTG_STATE_A_HOST;
- break;
- case 0xba:
- state = OTG_STATE_A_SUSPEND;
- break;
- default:
- break;
- }
- if (isp->phy.otg->state == state && !extra)
- return;
- pr_debug("otg: %s FSM %s/%02x, %s, %06x\n", tag,
- usb_otg_state_string(state), fsm, state_name(isp),
- omap_readl(OTG_CTRL));
-}
-
-#else
-
-static inline void check_state(struct isp1301 *isp, const char *tag) { }
-
-#endif
-
-/* outputs from ISP1301_INTERRUPT_SOURCE */
-static void update_otg1(struct isp1301 *isp, u8 int_src)
-{
- u32 otg_ctrl;
-
- otg_ctrl = omap_readl(OTG_CTRL) & OTG_CTRL_MASK;
- otg_ctrl &= ~OTG_XCEIV_INPUTS;
- otg_ctrl &= ~(OTG_ID|OTG_ASESSVLD|OTG_VBUSVLD);
-
- if (int_src & INTR_SESS_VLD)
- otg_ctrl |= OTG_ASESSVLD;
- else if (isp->phy.otg->state == OTG_STATE_A_WAIT_VFALL) {
- a_idle(isp, "vfall");
- otg_ctrl &= ~OTG_CTRL_BITS;
- }
- if (int_src & INTR_VBUS_VLD)
- otg_ctrl |= OTG_VBUSVLD;
- if (int_src & INTR_ID_GND) { /* default-A */
- if (isp->phy.otg->state == OTG_STATE_B_IDLE
- || isp->phy.otg->state
- == OTG_STATE_UNDEFINED) {
- a_idle(isp, "init");
- return;
- }
- } else { /* default-B */
- otg_ctrl |= OTG_ID;
- if (isp->phy.otg->state == OTG_STATE_A_IDLE
- || isp->phy.otg->state == OTG_STATE_UNDEFINED) {
- b_idle(isp, "init");
- return;
- }
- }
- omap_writel(otg_ctrl, OTG_CTRL);
-}
-
-/* outputs from ISP1301_OTG_STATUS */
-static void update_otg2(struct isp1301 *isp, u8 otg_status)
-{
- u32 otg_ctrl;
-
- otg_ctrl = omap_readl(OTG_CTRL) & OTG_CTRL_MASK;
- otg_ctrl &= ~OTG_XCEIV_INPUTS;
- otg_ctrl &= ~(OTG_BSESSVLD | OTG_BSESSEND);
- if (otg_status & OTG_B_SESS_VLD)
- otg_ctrl |= OTG_BSESSVLD;
- else if (otg_status & OTG_B_SESS_END)
- otg_ctrl |= OTG_BSESSEND;
- omap_writel(otg_ctrl, OTG_CTRL);
-}
-
-/* inputs going to ISP1301 */
-static void otg_update_isp(struct isp1301 *isp)
-{
- u32 otg_ctrl, otg_change;
- u8 set = OTG1_DM_PULLDOWN, clr = OTG1_DM_PULLUP;
-
- otg_ctrl = omap_readl(OTG_CTRL);
- otg_change = otg_ctrl ^ isp->last_otg_ctrl;
- isp->last_otg_ctrl = otg_ctrl;
- otg_ctrl = otg_ctrl & OTG_XCEIV_INPUTS;
-
- switch (isp->phy.otg->state) {
- case OTG_STATE_B_IDLE:
- case OTG_STATE_B_PERIPHERAL:
- case OTG_STATE_B_SRP_INIT:
- if (!(otg_ctrl & OTG_PULLUP)) {
- // if (otg_ctrl & OTG_B_HNPEN) {
- if (isp->phy.otg->gadget->b_hnp_enable) {
- isp->phy.otg->state = OTG_STATE_B_WAIT_ACON;
- pr_debug(" --> b_wait_acon\n");
- }
- goto pulldown;
- }
-pullup:
- set |= OTG1_DP_PULLUP;
- clr |= OTG1_DP_PULLDOWN;
- break;
- case OTG_STATE_A_SUSPEND:
- case OTG_STATE_A_PERIPHERAL:
- if (otg_ctrl & OTG_PULLUP)
- goto pullup;
- fallthrough;
- // case OTG_STATE_B_WAIT_ACON:
- default:
-pulldown:
- set |= OTG1_DP_PULLDOWN;
- clr |= OTG1_DP_PULLUP;
- break;
- }
-
-# define toggle(OTG,ISP) do { \
- if (otg_ctrl & OTG) set |= ISP; \
- else clr |= ISP; \
- } while (0)
-
- if (!(isp->phy.otg->host))
- otg_ctrl &= ~OTG_DRV_VBUS;
-
- switch (isp->phy.otg->state) {
- case OTG_STATE_A_SUSPEND:
- if (otg_ctrl & OTG_DRV_VBUS) {
- set |= OTG1_VBUS_DRV;
- break;
- }
- /* HNP failed for some reason (A_AIDL_BDIS timeout) */
- notresponding(isp);
-
- fallthrough;
- case OTG_STATE_A_VBUS_ERR:
- isp->phy.otg->state = OTG_STATE_A_WAIT_VFALL;
- pr_debug(" --> a_wait_vfall\n");
- fallthrough;
- case OTG_STATE_A_WAIT_VFALL:
- /* FIXME usbcore thinks port power is still on ... */
- clr |= OTG1_VBUS_DRV;
- break;
- case OTG_STATE_A_IDLE:
- if (otg_ctrl & OTG_DRV_VBUS) {
- isp->phy.otg->state = OTG_STATE_A_WAIT_VRISE;
- pr_debug(" --> a_wait_vrise\n");
- }
- fallthrough;
- default:
- toggle(OTG_DRV_VBUS, OTG1_VBUS_DRV);
- }
-
- toggle(OTG_PU_VBUS, OTG1_VBUS_CHRG);
- toggle(OTG_PD_VBUS, OTG1_VBUS_DISCHRG);
-
-# undef toggle
-
- isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, set);
- isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, clr);
-
- /* HNP switch to host or peripheral; and SRP */
- if (otg_change & OTG_PULLUP) {
- u32 l;
-
- switch (isp->phy.otg->state) {
- case OTG_STATE_B_IDLE:
- if (clr & OTG1_DP_PULLUP)
- break;
- isp->phy.otg->state = OTG_STATE_B_PERIPHERAL;
- pr_debug(" --> b_peripheral\n");
- break;
- case OTG_STATE_A_SUSPEND:
- if (clr & OTG1_DP_PULLUP)
- break;
- isp->phy.otg->state = OTG_STATE_A_PERIPHERAL;
- pr_debug(" --> a_peripheral\n");
- break;
- default:
- break;
- }
- l = omap_readl(OTG_CTRL);
- l |= OTG_PULLUP;
- omap_writel(l, OTG_CTRL);
- }
-
- check_state(isp, __func__);
- dump_regs(isp, "otg->isp1301");
-}
-
-static irqreturn_t omap_otg_irq(int irq, void *_isp)
-{
- u16 otg_irq = omap_readw(OTG_IRQ_SRC);
- u32 otg_ctrl;
- int ret = IRQ_NONE;
- struct isp1301 *isp = _isp;
- struct usb_otg *otg = isp->phy.otg;
-
- /* update ISP1301 transceiver from OTG controller */
- if (otg_irq & OPRT_CHG) {
- omap_writew(OPRT_CHG, OTG_IRQ_SRC);
- isp1301_defer_work(isp, WORK_UPDATE_ISP);
- ret = IRQ_HANDLED;
-
- /* SRP to become b_peripheral failed */
- } else if (otg_irq & B_SRP_TMROUT) {
- pr_debug("otg: B_SRP_TIMEOUT, %06x\n", omap_readl(OTG_CTRL));
- notresponding(isp);
-
- /* gadget drivers that care should monitor all kinds of
- * remote wakeup (SRP, normal) using their own timer
- * to give "check cable and A-device" messages.
- */
- if (isp->phy.otg->state == OTG_STATE_B_SRP_INIT)
- b_idle(isp, "srp_timeout");
-
- omap_writew(B_SRP_TMROUT, OTG_IRQ_SRC);
- ret = IRQ_HANDLED;
-
- /* HNP to become b_host failed */
- } else if (otg_irq & B_HNP_FAIL) {
- pr_debug("otg: %s B_HNP_FAIL, %06x\n",
- state_name(isp), omap_readl(OTG_CTRL));
- notresponding(isp);
-
- otg_ctrl = omap_readl(OTG_CTRL);
- otg_ctrl |= OTG_BUSDROP;
- otg_ctrl &= OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
- omap_writel(otg_ctrl, OTG_CTRL);
-
- /* subset of b_peripheral()... */
- isp->phy.otg->state = OTG_STATE_B_PERIPHERAL;
- pr_debug(" --> b_peripheral\n");
-
- omap_writew(B_HNP_FAIL, OTG_IRQ_SRC);
- ret = IRQ_HANDLED;
-
- /* detect SRP from B-device ... */
- } else if (otg_irq & A_SRP_DETECT) {
- pr_debug("otg: %s SRP_DETECT, %06x\n",
- state_name(isp), omap_readl(OTG_CTRL));
-
- isp1301_defer_work(isp, WORK_UPDATE_OTG);
- switch (isp->phy.otg->state) {
- case OTG_STATE_A_IDLE:
- if (!otg->host)
- break;
- isp1301_defer_work(isp, WORK_HOST_RESUME);
- otg_ctrl = omap_readl(OTG_CTRL);
- otg_ctrl |= OTG_A_BUSREQ;
- otg_ctrl &= ~(OTG_BUSDROP|OTG_B_BUSREQ)
- & ~OTG_XCEIV_INPUTS
- & OTG_CTRL_MASK;
- omap_writel(otg_ctrl, OTG_CTRL);
- break;
- default:
- break;
- }
-
- omap_writew(A_SRP_DETECT, OTG_IRQ_SRC);
- ret = IRQ_HANDLED;
-
- /* timer expired: T(a_wait_bcon) and maybe T(a_wait_vrise)
- * we don't track them separately
- */
- } else if (otg_irq & A_REQ_TMROUT) {
- otg_ctrl = omap_readl(OTG_CTRL);
- pr_info("otg: BCON_TMOUT from %s, %06x\n",
- state_name(isp), otg_ctrl);
- notresponding(isp);
-
- otg_ctrl |= OTG_BUSDROP;
- otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
- omap_writel(otg_ctrl, OTG_CTRL);
- isp->phy.otg->state = OTG_STATE_A_WAIT_VFALL;
-
- omap_writew(A_REQ_TMROUT, OTG_IRQ_SRC);
- ret = IRQ_HANDLED;
-
- /* A-supplied voltage fell too low; overcurrent */
- } else if (otg_irq & A_VBUS_ERR) {
- otg_ctrl = omap_readl(OTG_CTRL);
- printk(KERN_ERR "otg: %s, VBUS_ERR %04x ctrl %06x\n",
- state_name(isp), otg_irq, otg_ctrl);
-
- otg_ctrl |= OTG_BUSDROP;
- otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
- omap_writel(otg_ctrl, OTG_CTRL);
- isp->phy.otg->state = OTG_STATE_A_VBUS_ERR;
-
- omap_writew(A_VBUS_ERR, OTG_IRQ_SRC);
- ret = IRQ_HANDLED;
-
- /* switch driver; the transceiver code activates it,
- * ungating the udc clock or resuming OHCI.
- */
- } else if (otg_irq & DRIVER_SWITCH) {
- int kick = 0;
-
- otg_ctrl = omap_readl(OTG_CTRL);
- printk(KERN_NOTICE "otg: %s, SWITCH to %s, ctrl %06x\n",
- state_name(isp),
- (otg_ctrl & OTG_DRIVER_SEL)
- ? "gadget" : "host",
- otg_ctrl);
- isp1301_defer_work(isp, WORK_UPDATE_ISP);
-
- /* role is peripheral */
- if (otg_ctrl & OTG_DRIVER_SEL) {
- switch (isp->phy.otg->state) {
- case OTG_STATE_A_IDLE:
- b_idle(isp, __func__);
- break;
- default:
- break;
- }
- isp1301_defer_work(isp, WORK_UPDATE_ISP);
-
- /* role is host */
- } else {
- if (!(otg_ctrl & OTG_ID)) {
- otg_ctrl &= OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
- omap_writel(otg_ctrl | OTG_A_BUSREQ, OTG_CTRL);
- }
-
- if (otg->host) {
- switch (isp->phy.otg->state) {
- case OTG_STATE_B_WAIT_ACON:
- isp->phy.otg->state = OTG_STATE_B_HOST;
- pr_debug(" --> b_host\n");
- kick = 1;
- break;
- case OTG_STATE_A_WAIT_BCON:
- isp->phy.otg->state = OTG_STATE_A_HOST;
- pr_debug(" --> a_host\n");
- break;
- case OTG_STATE_A_PERIPHERAL:
- isp->phy.otg->state = OTG_STATE_A_WAIT_BCON;
- pr_debug(" --> a_wait_bcon\n");
- break;
- default:
- break;
- }
- isp1301_defer_work(isp, WORK_HOST_RESUME);
- }
- }
-
- omap_writew(DRIVER_SWITCH, OTG_IRQ_SRC);
- ret = IRQ_HANDLED;
-
- if (kick)
- usb_bus_start_enum(otg->host, otg->host->otg_port);
- }
-
- check_state(isp, __func__);
- return ret;
-}
-
-static struct platform_device *otg_dev;
-
-static int isp1301_otg_init(struct isp1301 *isp)
-{
- u32 l;
-
- if (!otg_dev)
- return -ENODEV;
-
- dump_regs(isp, __func__);
- /* some of these values are board-specific... */
- l = omap_readl(OTG_SYSCON_2);
- l |= OTG_EN
- /* for B-device: */
- | SRP_GPDATA /* 9msec Bdev D+ pulse */
- | SRP_GPDVBUS /* discharge after VBUS pulse */
- // | (3 << 24) /* 2msec VBUS pulse */
- /* for A-device: */
- | (0 << 20) /* 200ms nominal A_WAIT_VRISE timer */
- | SRP_DPW /* detect 167+ns SRP pulses */
- | SRP_DATA | SRP_VBUS /* accept both kinds of SRP pulse */
- ;
- omap_writel(l, OTG_SYSCON_2);
-
- update_otg1(isp, isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE));
- update_otg2(isp, isp1301_get_u8(isp, ISP1301_OTG_STATUS));
-
- check_state(isp, __func__);
- pr_debug("otg: %s, %s %06x\n",
- state_name(isp), __func__, omap_readl(OTG_CTRL));
-
- omap_writew(DRIVER_SWITCH | OPRT_CHG
- | B_SRP_TMROUT | B_HNP_FAIL
- | A_VBUS_ERR | A_SRP_DETECT | A_REQ_TMROUT, OTG_IRQ_EN);
-
- l = omap_readl(OTG_SYSCON_2);
- l |= OTG_EN;
- omap_writel(l, OTG_SYSCON_2);
-
- return 0;
-}
-
-static int otg_probe(struct platform_device *dev)
-{
- // struct omap_usb_config *config = dev->platform_data;
-
- otg_dev = dev;
- return 0;
-}
-
-static int otg_remove(struct platform_device *dev)
-{
- otg_dev = NULL;
- return 0;
-}
-
-static struct platform_driver omap_otg_driver = {
- .probe = otg_probe,
- .remove = otg_remove,
- .driver = {
- .name = "omap_otg",
- },
-};
-
-static int otg_bind(struct isp1301 *isp)
-{
- int status;
-
- if (otg_dev)
- return -EBUSY;
-
- status = platform_driver_register(&omap_otg_driver);
- if (status < 0)
- return status;
-
- if (otg_dev)
- status = request_irq(otg_dev->resource[1].start, omap_otg_irq,
- 0, DRIVER_NAME, isp);
- else
- status = -ENODEV;
-
- if (status < 0)
- platform_driver_unregister(&omap_otg_driver);
- return status;
-}
-
-static void otg_unbind(struct isp1301 *isp)
-{
- if (!otg_dev)
- return;
- free_irq(otg_dev->resource[1].start, isp);
-}
-
-#else
-
-/* OTG controller isn't clocked */
-
-#endif /* CONFIG_USB_OTG */
-
-/*-------------------------------------------------------------------------*/
-
-static void b_peripheral(struct isp1301 *isp)
-{
- u32 l;
-
- l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS;
- omap_writel(l, OTG_CTRL);
-
- usb_gadget_vbus_connect(isp->phy.otg->gadget);
-
-#ifdef CONFIG_USB_OTG
- otg_update_isp(isp);
-#else
- /* UDC driver just set OTG_BSESSVLD */
- isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_DP_PULLUP);
- isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_DP_PULLDOWN);
- isp->phy.otg->state = OTG_STATE_B_PERIPHERAL;
- pr_debug(" --> b_peripheral\n");
- dump_regs(isp, "2periph");
-#endif
-}
-
-static void isp_update_otg(struct isp1301 *isp, u8 stat)
-{
- struct usb_otg *otg = isp->phy.otg;
- u8 isp_stat, isp_bstat;
- enum usb_otg_state state = isp->phy.otg->state;
-
- if (stat & INTR_BDIS_ACON)
- pr_debug("OTG: BDIS_ACON, %s\n", state_name(isp));
-
- /* start certain state transitions right away */
- isp_stat = isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE);
- if (isp_stat & INTR_ID_GND) {
- if (otg->default_a) {
- switch (state) {
- case OTG_STATE_B_IDLE:
- a_idle(isp, "idle");
- fallthrough;
- case OTG_STATE_A_IDLE:
- fallthrough;
- case OTG_STATE_A_WAIT_VRISE:
- /* we skip over OTG_STATE_A_WAIT_BCON, since
- * the HC will transition to A_HOST (or
- * A_SUSPEND!) without our noticing except
- * when HNP is used.
- */
- if (isp_stat & INTR_VBUS_VLD)
- isp->phy.otg->state = OTG_STATE_A_HOST;
- break;
- case OTG_STATE_A_WAIT_VFALL:
- if (!(isp_stat & INTR_SESS_VLD))
- a_idle(isp, "vfell");
- break;
- default:
- if (!(isp_stat & INTR_VBUS_VLD))
- isp->phy.otg->state = OTG_STATE_A_VBUS_ERR;
- break;
- }
- isp_bstat = isp1301_get_u8(isp, ISP1301_OTG_STATUS);
- } else {
- switch (state) {
- case OTG_STATE_B_PERIPHERAL:
- case OTG_STATE_B_HOST:
- case OTG_STATE_B_WAIT_ACON:
- usb_gadget_vbus_disconnect(otg->gadget);
- break;
- default:
- break;
- }
- if (state != OTG_STATE_A_IDLE)
- a_idle(isp, "id");
- if (otg->host && state == OTG_STATE_A_IDLE)
- isp1301_defer_work(isp, WORK_HOST_RESUME);
- isp_bstat = 0;
- }
- } else {
- u32 l;
-
- /* if user unplugged mini-A end of cable,
- * don't bypass A_WAIT_VFALL.
- */
- if (otg->default_a) {
- switch (state) {
- default:
- isp->phy.otg->state = OTG_STATE_A_WAIT_VFALL;
- break;
- case OTG_STATE_A_WAIT_VFALL:
- state = OTG_STATE_A_IDLE;
- /* hub_wq may take a while to notice and
- * handle this disconnect, so don't go
- * to B_IDLE quite yet.
- */
- break;
- case OTG_STATE_A_IDLE:
- host_suspend(isp);
- isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1,
- MC1_BDIS_ACON_EN);
- isp->phy.otg->state = OTG_STATE_B_IDLE;
- l = omap_readl(OTG_CTRL) & OTG_CTRL_MASK;
- l &= ~OTG_CTRL_BITS;
- omap_writel(l, OTG_CTRL);
- break;
- case OTG_STATE_B_IDLE:
- break;
- }
- }
- isp_bstat = isp1301_get_u8(isp, ISP1301_OTG_STATUS);
-
- switch (isp->phy.otg->state) {
- case OTG_STATE_B_PERIPHERAL:
- case OTG_STATE_B_WAIT_ACON:
- case OTG_STATE_B_HOST:
- if (likely(isp_bstat & OTG_B_SESS_VLD))
- break;
-#ifndef CONFIG_USB_OTG
- /* UDC driver will clear OTG_BSESSVLD */
- isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1,
- OTG1_DP_PULLDOWN);
- isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1,
- OTG1_DP_PULLUP);
- dump_regs(isp, __func__);
-#endif
- fallthrough;
- case OTG_STATE_B_SRP_INIT:
- b_idle(isp, __func__);
- l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS;
- omap_writel(l, OTG_CTRL);
- fallthrough;
- case OTG_STATE_B_IDLE:
- if (otg->gadget && (isp_bstat & OTG_B_SESS_VLD)) {
-#ifdef CONFIG_USB_OTG
- update_otg1(isp, isp_stat);
- update_otg2(isp, isp_bstat);
-#endif
- b_peripheral(isp);
- } else if (!(isp_stat & (INTR_VBUS_VLD|INTR_SESS_VLD)))
- isp_bstat |= OTG_B_SESS_END;
- break;
- case OTG_STATE_A_WAIT_VFALL:
- break;
- default:
- pr_debug("otg: unsupported b-device %s\n",
- state_name(isp));
- break;
- }
- }
-
- if (state != isp->phy.otg->state)
- pr_debug(" isp, %s -> %s\n",
- usb_otg_state_string(state), state_name(isp));
-
-#ifdef CONFIG_USB_OTG
- /* update the OTG controller state to match the isp1301; may
- * trigger OPRT_CHG irqs for changes going to the isp1301.
- */
- update_otg1(isp, isp_stat);
- update_otg2(isp, isp_bstat);
- check_state(isp, __func__);
-#endif
-
- dump_regs(isp, "isp1301->otg");
-}
-
-/*-------------------------------------------------------------------------*/
-
-static u8 isp1301_clear_latch(struct isp1301 *isp)
-{
- u8 latch = isp1301_get_u8(isp, ISP1301_INTERRUPT_LATCH);
- isp1301_clear_bits(isp, ISP1301_INTERRUPT_LATCH, latch);
- return latch;
-}
-
-static void
-isp1301_work(struct work_struct *work)
-{
- struct isp1301 *isp = container_of(work, struct isp1301, work);
- int stop;
-
- /* implicit lock: we're the only task using this device */
- isp->working = 1;
- do {
- stop = test_bit(WORK_STOP, &isp->todo);
-
-#ifdef CONFIG_USB_OTG
- /* transfer state from otg engine to isp1301 */
- if (test_and_clear_bit(WORK_UPDATE_ISP, &isp->todo)) {
- otg_update_isp(isp);
- put_device(&isp->client->dev);
- }
-#endif
- /* transfer state from isp1301 to otg engine */
- if (test_and_clear_bit(WORK_UPDATE_OTG, &isp->todo)) {
- u8 stat = isp1301_clear_latch(isp);
-
- isp_update_otg(isp, stat);
- put_device(&isp->client->dev);
- }
-
- if (test_and_clear_bit(WORK_HOST_RESUME, &isp->todo)) {
- u32 otg_ctrl;
-
- /*
- * skip A_WAIT_VRISE; hc transitions invisibly
- * skip A_WAIT_BCON; same.
- */
- switch (isp->phy.otg->state) {
- case OTG_STATE_A_WAIT_BCON:
- case OTG_STATE_A_WAIT_VRISE:
- isp->phy.otg->state = OTG_STATE_A_HOST;
- pr_debug(" --> a_host\n");
- otg_ctrl = omap_readl(OTG_CTRL);
- otg_ctrl |= OTG_A_BUSREQ;
- otg_ctrl &= ~(OTG_BUSDROP|OTG_B_BUSREQ)
- & OTG_CTRL_MASK;
- omap_writel(otg_ctrl, OTG_CTRL);
- break;
- case OTG_STATE_B_WAIT_ACON:
- isp->phy.otg->state = OTG_STATE_B_HOST;
- pr_debug(" --> b_host (acon)\n");
- break;
- case OTG_STATE_B_HOST:
- case OTG_STATE_B_IDLE:
- case OTG_STATE_A_IDLE:
- break;
- default:
- pr_debug(" host resume in %s\n",
- state_name(isp));
- }
- host_resume(isp);
- // mdelay(10);
- put_device(&isp->client->dev);
- }
-
- if (test_and_clear_bit(WORK_TIMER, &isp->todo)) {
-#ifdef VERBOSE
- dump_regs(isp, "timer");
- if (!stop)
- mod_timer(&isp->timer, jiffies + TIMER_JIFFIES);
-#endif
- put_device(&isp->client->dev);
- }
-
- if (isp->todo)
- dev_vdbg(&isp->client->dev,
- "work done, todo = 0x%lx\n",
- isp->todo);
- if (stop) {
- dev_dbg(&isp->client->dev, "stop\n");
- break;
- }
- } while (isp->todo);
- isp->working = 0;
-}
-
-static irqreturn_t isp1301_irq(int irq, void *isp)
-{
- isp1301_defer_work(isp, WORK_UPDATE_OTG);
- return IRQ_HANDLED;
-}
-
-static void isp1301_timer(struct timer_list *t)
-{
- struct isp1301 *isp = from_timer(isp, t, timer);
-
- isp1301_defer_work(isp, WORK_TIMER);
-}
-
-/*-------------------------------------------------------------------------*/
-
-static void isp1301_release(struct device *dev)
-{
- struct isp1301 *isp;
-
- isp = dev_get_drvdata(dev);
-
- /* FIXME -- not with a "new style" driver, it doesn't!! */
-
- /* ugly -- i2c hijacks our memory hook to wait_for_completion() */
- if (isp->i2c_release)
- isp->i2c_release(dev);
- kfree(isp->phy.otg);
- kfree (isp);
-}
-
-static struct isp1301 *the_transceiver;
-
-static void isp1301_remove(struct i2c_client *i2c)
-{
- struct isp1301 *isp;
-
- isp = i2c_get_clientdata(i2c);
-
- isp1301_clear_bits(isp, ISP1301_INTERRUPT_FALLING, ~0);
- isp1301_clear_bits(isp, ISP1301_INTERRUPT_RISING, ~0);
- free_irq(i2c->irq, isp);
-#ifdef CONFIG_USB_OTG
- otg_unbind(isp);
-#endif
- set_bit(WORK_STOP, &isp->todo);
- del_timer_sync(&isp->timer);
- flush_work(&isp->work);
-
- put_device(&i2c->dev);
- the_transceiver = NULL;
-}
-
-/*-------------------------------------------------------------------------*/
-
-/* NOTE: three modes are possible here, only one of which
- * will be standards-conformant on any given system:
- *
- * - OTG mode (dual-role), required if there's a Mini-AB connector
- * - HOST mode, for when there's one or more A (host) connectors
- * - DEVICE mode, for when there's a B/Mini-B (device) connector
- *
- * As a rule, you won't have an isp1301 chip unless it's there to
- * support the OTG mode. Other modes help testing USB controllers
- * in isolation from (full) OTG support, or maybe so later board
- * revisions can help to support those feature.
- */
-
-#ifdef CONFIG_USB_OTG
-
-static int isp1301_otg_enable(struct isp1301 *isp)
-{
- power_up(isp);
- isp1301_otg_init(isp);
-
- /* NOTE: since we don't change this, this provides
- * a few more interrupts than are strictly needed.
- */
- isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING,
- INTR_VBUS_VLD | INTR_SESS_VLD | INTR_ID_GND);
- isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING,
- INTR_VBUS_VLD | INTR_SESS_VLD | INTR_ID_GND);
-
- dev_info(&isp->client->dev, "ready for dual-role USB ...\n");
-
- return 0;
-}
-
-#endif
-
-/* add or disable the host device+driver */
-static int
-isp1301_set_host(struct usb_otg *otg, struct usb_bus *host)
-{
- struct isp1301 *isp = container_of(otg->usb_phy, struct isp1301, phy);
-
- if (isp != the_transceiver)
- return -ENODEV;
-
- if (!host) {
- omap_writew(0, OTG_IRQ_EN);
- power_down(isp);
- otg->host = NULL;
- return 0;
- }
-
-#ifdef CONFIG_USB_OTG
- otg->host = host;
- dev_dbg(&isp->client->dev, "registered host\n");
- host_suspend(isp);
- if (otg->gadget)
- return isp1301_otg_enable(isp);
- return 0;
-
-#elif !IS_ENABLED(CONFIG_USB_OMAP)
- // FIXME update its refcount
- otg->host = host;
-
- power_up(isp);
-
- dev_info(&isp->client->dev, "A-Host sessions ok\n");
- isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING,
- INTR_ID_GND);
- isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING,
- INTR_ID_GND);
-
- /* If this has a Mini-AB connector, this mode is highly
- * nonstandard ... but can be handy for testing, especially with
- * the Mini-A end of an OTG cable. (Or something nonstandard
- * like MiniB-to-StandardB, maybe built with a gender mender.)
- */
- isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_VBUS_DRV);
-
- dump_regs(isp, __func__);
-
- return 0;
-
-#else
- dev_dbg(&isp->client->dev, "host sessions not allowed\n");
- return -EINVAL;
-#endif
-
-}
-
-static int
-isp1301_set_peripheral(struct usb_otg *otg, struct usb_gadget *gadget)
-{
- struct isp1301 *isp = container_of(otg->usb_phy, struct isp1301, phy);
-
- if (isp != the_transceiver)
- return -ENODEV;
-
- if (!gadget) {
- omap_writew(0, OTG_IRQ_EN);
- usb_gadget_vbus_disconnect(otg->gadget);
- otg->gadget = NULL;
- power_down(isp);
- return 0;
- }
-
-#ifdef CONFIG_USB_OTG
- otg->gadget = gadget;
- dev_dbg(&isp->client->dev, "registered gadget\n");
- /* gadget driver may be suspended until vbus_connect () */
- if (otg->host)
- return isp1301_otg_enable(isp);
- return 0;
-
-#elif !defined(CONFIG_USB_OHCI_HCD) && !defined(CONFIG_USB_OHCI_HCD_MODULE)
- otg->gadget = gadget;
- // FIXME update its refcount
-
- {
- u32 l;
-
- l = omap_readl(OTG_CTRL) & OTG_CTRL_MASK;
- l &= ~(OTG_XCEIV_OUTPUTS|OTG_CTRL_BITS);
- l |= OTG_ID;
- omap_writel(l, OTG_CTRL);
- }
-
- power_up(isp);
- isp->phy.otg->state = OTG_STATE_B_IDLE;
-
- isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING,
- INTR_SESS_VLD);
- isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING,
- INTR_VBUS_VLD);
- dev_info(&isp->client->dev, "B-Peripheral sessions ok\n");
- dump_regs(isp, __func__);
-
- /* If this has a Mini-AB connector, this mode is highly
- * nonstandard ... but can be handy for testing, so long
- * as you don't plug a Mini-A cable into the jack.
- */
- if (isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE) & INTR_VBUS_VLD)
- b_peripheral(isp);
-
- return 0;
-
-#else
- dev_dbg(&isp->client->dev, "peripheral sessions not allowed\n");
- return -EINVAL;
-#endif
-}
-
-
-/*-------------------------------------------------------------------------*/
-
-static int
-isp1301_start_srp(struct usb_otg *otg)
-{
- struct isp1301 *isp = container_of(otg->usb_phy, struct isp1301, phy);
- u32 otg_ctrl;
-
- if (isp != the_transceiver || isp->phy.otg->state != OTG_STATE_B_IDLE)
- return -ENODEV;
-
- otg_ctrl = omap_readl(OTG_CTRL);
- if (!(otg_ctrl & OTG_BSESSEND))
- return -EINVAL;
-
- otg_ctrl |= OTG_B_BUSREQ;
- otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK;
- omap_writel(otg_ctrl, OTG_CTRL);
- isp->phy.otg->state = OTG_STATE_B_SRP_INIT;
-
- pr_debug("otg: SRP, %s ... %06x\n", state_name(isp),
- omap_readl(OTG_CTRL));
-#ifdef CONFIG_USB_OTG
- check_state(isp, __func__);
-#endif
- return 0;
-}
-
-static int
-isp1301_start_hnp(struct usb_otg *otg)
-{
-#ifdef CONFIG_USB_OTG
- struct isp1301 *isp = container_of(otg->usb_phy, struct isp1301, phy);
- u32 l;
-
- if (isp != the_transceiver)
- return -ENODEV;
- if (otg->default_a && (otg->host == NULL || !otg->host->b_hnp_enable))
- return -ENOTCONN;
- if (!otg->default_a && (otg->gadget == NULL
- || !otg->gadget->b_hnp_enable))
- return -ENOTCONN;
-
- /* We want hardware to manage most HNP protocol timings.
- * So do this part as early as possible...
- */
- switch (isp->phy.otg->state) {
- case OTG_STATE_B_HOST:
- isp->phy.otg->state = OTG_STATE_B_PERIPHERAL;
- /* caller will suspend next */
- break;
- case OTG_STATE_A_HOST:
-#if 0
- /* autoconnect mode avoids irq latency bugs */
- isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1,
- MC1_BDIS_ACON_EN);
-#endif
- /* caller must suspend then clear A_BUSREQ */
- usb_gadget_vbus_connect(otg->gadget);
- l = omap_readl(OTG_CTRL);
- l |= OTG_A_SETB_HNPEN;
- omap_writel(l, OTG_CTRL);
-
- break;
- case OTG_STATE_A_PERIPHERAL:
- /* initiated by B-Host suspend */
- break;
- default:
- return -EILSEQ;
- }
- pr_debug("otg: HNP %s, %06x ...\n",
- state_name(isp), omap_readl(OTG_CTRL));
- check_state(isp, __func__);
- return 0;
-#else
- /* srp-only */
- return -EINVAL;
-#endif
-}
-
-/*-------------------------------------------------------------------------*/
-
-static int
-isp1301_probe(struct i2c_client *i2c)
-{
- int status;
- struct isp1301 *isp;
- int irq;
-
- if (the_transceiver)
- return 0;
-
- isp = kzalloc(sizeof *isp, GFP_KERNEL);
- if (!isp)
- return 0;
-
- isp->phy.otg = kzalloc(sizeof *isp->phy.otg, GFP_KERNEL);
- if (!isp->phy.otg) {
- kfree(isp);
- return 0;
- }
-
- INIT_WORK(&isp->work, isp1301_work);
- timer_setup(&isp->timer, isp1301_timer, 0);
-
- i2c_set_clientdata(i2c, isp);
- isp->client = i2c;
-
- /* verify the chip (shouldn't be necessary) */
- status = isp1301_get_u16(isp, ISP1301_VENDOR_ID);
- if (status != I2C_VENDOR_ID_PHILIPS) {
- dev_dbg(&i2c->dev, "not philips id: %d\n", status);
- goto fail;
- }
- status = isp1301_get_u16(isp, ISP1301_PRODUCT_ID);
- if (status != I2C_PRODUCT_ID_PHILIPS_1301) {
- dev_dbg(&i2c->dev, "not isp1301, %d\n", status);
- goto fail;
- }
- isp->i2c_release = i2c->dev.release;
- i2c->dev.release = isp1301_release;
-
- /* initial development used chiprev 2.00 */
- status = i2c_smbus_read_word_data(i2c, ISP1301_BCD_DEVICE);
- dev_info(&i2c->dev, "chiprev %x.%02x, driver " DRIVER_VERSION "\n",
- status >> 8, status & 0xff);
-
- /* make like power-on reset */
- isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_MASK);
-
- isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, MC2_BI_DI);
- isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_2, ~MC2_BI_DI);
-
- isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1,
- OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN);
- isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1,
- ~(OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN));
-
- isp1301_clear_bits(isp, ISP1301_INTERRUPT_LATCH, ~0);
- isp1301_clear_bits(isp, ISP1301_INTERRUPT_FALLING, ~0);
- isp1301_clear_bits(isp, ISP1301_INTERRUPT_RISING, ~0);
-
-#ifdef CONFIG_USB_OTG
- status = otg_bind(isp);
- if (status < 0) {
- dev_dbg(&i2c->dev, "can't bind OTG\n");
- goto fail;
- }
-#endif
-
- irq = i2c->irq;
-
- status = request_irq(irq, isp1301_irq,
- isp->irq_type, DRIVER_NAME, isp);
- if (status < 0) {
- dev_dbg(&i2c->dev, "can't get IRQ %d, err %d\n",
- i2c->irq, status);
- goto fail;
- }
-
- isp->phy.dev = &i2c->dev;
- isp->phy.label = DRIVER_NAME;
- isp->phy.otg->usb_phy = &isp->phy;
- isp->phy.otg->set_host = isp1301_set_host;
- isp->phy.otg->set_peripheral = isp1301_set_peripheral;
- isp->phy.otg->start_srp = isp1301_start_srp;
- isp->phy.otg->start_hnp = isp1301_start_hnp;
-
- power_down(isp);
- the_transceiver = isp;
-
-#ifdef CONFIG_USB_OTG
- update_otg1(isp, isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE));
- update_otg2(isp, isp1301_get_u8(isp, ISP1301_OTG_STATUS));
-#endif
-
- dump_regs(isp, __func__);
-
-#ifdef VERBOSE
- mod_timer(&isp->timer, jiffies + TIMER_JIFFIES);
- dev_dbg(&i2c->dev, "scheduled timer, %d min\n", TIMER_MINUTES);
-#endif
-
- status = usb_add_phy(&isp->phy, USB_PHY_TYPE_USB2);
- if (status < 0)
- dev_err(&i2c->dev, "can't register transceiver, %d\n",
- status);
-
- return 0;
-
-fail:
- kfree(isp->phy.otg);
- kfree(isp);
- return -ENODEV;
-}
-
-static const struct i2c_device_id isp1301_id[] = {
- { "isp1301_omap", 0 },
- { }
-};
-MODULE_DEVICE_TABLE(i2c, isp1301_id);
-
-static struct i2c_driver isp1301_driver = {
- .driver = {
- .name = "isp1301_omap",
- },
- .probe_new = isp1301_probe,
- .remove = isp1301_remove,
- .id_table = isp1301_id,
-};
-
-/*-------------------------------------------------------------------------*/
-
-static int __init isp_init(void)
-{
- return i2c_add_driver(&isp1301_driver);
-}
-subsys_initcall(isp_init);
-
-static void __exit isp_exit(void)
-{
- if (the_transceiver)
- usb_remove_phy(&the_transceiver->phy);
- i2c_del_driver(&isp1301_driver);
-}
-module_exit(isp_exit);
-
projects / platform / kernel / linux-rpi.git / commitdiff