From c37d4a0085c58d9e45930ead6acd13ac75a8fb67 Mon Sep 17 00:00:00 2001 From: Zhao Qiang Date: Mon, 27 Jun 2016 09:30:22 +0800 Subject: [PATCH] Maxim/driver: Add driver for maxim ds26522 Signed-off-by: Zhao Qiang Signed-off-by: David S. Miller --- drivers/net/wan/Kconfig | 11 ++ drivers/net/wan/Makefile | 1 + drivers/net/wan/slic_ds26522.c | 255 +++++++++++++++++++++++++++++++++++++++++ drivers/net/wan/slic_ds26522.h | 134 ++++++++++++++++++++++ 4 files changed, 401 insertions(+) create mode 100644 drivers/net/wan/slic_ds26522.c create mode 100644 drivers/net/wan/slic_ds26522.h diff --git a/drivers/net/wan/Kconfig b/drivers/net/wan/Kconfig index 9e314b7..33ab334 100644 --- a/drivers/net/wan/Kconfig +++ b/drivers/net/wan/Kconfig @@ -291,6 +291,17 @@ config FSL_UCC_HDLC To compile this driver as a module, choose M here: the module will be called fsl_ucc_hdlc. +config SLIC_DS26522 + tristate "Slic Maxim ds26522 card support" + depends on SPI + depends on FSL_SOC || ARCH_MXC || ARCH_LAYERSCAPE + help + This module initializes and configures the slic maxim card + in T1 or E1 mode. + + To compile this driver as a module, choose M here: the + module will be called slic_ds26522. + config DSCC4_PCISYNC bool "Etinc PCISYNC features" depends on DSCC4 diff --git a/drivers/net/wan/Makefile b/drivers/net/wan/Makefile index 25fec40..73c2326 100644 --- a/drivers/net/wan/Makefile +++ b/drivers/net/wan/Makefile @@ -33,6 +33,7 @@ obj-$(CONFIG_PCI200SYN) += pci200syn.o obj-$(CONFIG_PC300TOO) += pc300too.o obj-$(CONFIG_IXP4XX_HSS) += ixp4xx_hss.o obj-$(CONFIG_FSL_UCC_HDLC) += fsl_ucc_hdlc.o +obj-$(CONFIG_SLIC_DS26522) += slic_ds26522.o clean-files := wanxlfw.inc $(obj)/wanxl.o: $(obj)/wanxlfw.inc diff --git a/drivers/net/wan/slic_ds26522.c b/drivers/net/wan/slic_ds26522.c new file mode 100644 index 0000000..d06a887 --- /dev/null +++ b/drivers/net/wan/slic_ds26522.c @@ -0,0 +1,255 @@ +/* + * drivers/net/wan/slic_ds26522.c + * + * Copyright (C) 2016 Freescale Semiconductor, Inc. + * + * Author:Zhao Qiang + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "slic_ds26522.h" + +#define DRV_NAME "ds26522" + +#define SLIC_TRANS_LEN 1 +#define SLIC_TWO_LEN 2 +#define SLIC_THREE_LEN 3 + +static struct spi_device *g_spi; + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Zhao Qiang"); + +/* the read/write format of address is + * w/r|A13|A12|A11|A10|A9|A8|A7|A6|A5|A4|A3|A2|A1|A0|x + */ +static void slic_write(struct spi_device *spi, u16 addr, + u8 data) +{ + u8 temp[3]; + + addr = bitrev16(addr) >> 1; + data = bitrev8(data); + temp[0] = (u8)((addr >> 8) & 0x7f); + temp[1] = (u8)(addr & 0xfe); + temp[2] = data; + + /* write spi addr and value */ + spi_write(spi, &temp[0], SLIC_THREE_LEN); +} + +static u8 slic_read(struct spi_device *spi, u16 addr) +{ + u8 temp[2]; + u8 data; + + addr = bitrev16(addr) >> 1; + temp[0] = (u8)(((addr >> 8) & 0x7f) | 0x80); + temp[1] = (u8)(addr & 0xfe); + + spi_write_then_read(spi, &temp[0], SLIC_TWO_LEN, &data, + SLIC_TRANS_LEN); + + data = bitrev8(data); + return data; +} + +static bool get_slic_product_code(struct spi_device *spi) +{ + u8 device_id; + + device_id = slic_read(spi, DS26522_IDR_ADDR); + if ((device_id & 0xf8) == 0x68) + return true; + else + return false; +} + +static void ds26522_e1_spec_config(struct spi_device *spi) +{ + /* Receive E1 Mode, Framer Disabled */ + slic_write(spi, DS26522_RMMR_ADDR, DS26522_RMMR_E1); + + /* Transmit E1 Mode, Framer Disable */ + slic_write(spi, DS26522_TMMR_ADDR, DS26522_TMMR_E1); + + /* Receive E1 Mode Framer Enable */ + slic_write(spi, DS26522_RMMR_ADDR, + slic_read(spi, DS26522_RMMR_ADDR) | DS26522_RMMR_FRM_EN); + + /* Transmit E1 Mode Framer Enable */ + slic_write(spi, DS26522_TMMR_ADDR, + slic_read(spi, DS26522_TMMR_ADDR) | DS26522_TMMR_FRM_EN); + + /* RCR1, receive E1 B8zs & ESF */ + slic_write(spi, DS26522_RCR1_ADDR, + DS26522_RCR1_E1_HDB3 | DS26522_RCR1_E1_CCS); + + /* RSYSCLK=2.048MHz, RSYNC-Output */ + slic_write(spi, DS26522_RIOCR_ADDR, + DS26522_RIOCR_2048KHZ | DS26522_RIOCR_RSIO_OUT); + + /* TCR1 Transmit E1 b8zs */ + slic_write(spi, DS26522_TCR1_ADDR, DS26522_TCR1_TB8ZS); + + /* TSYSCLK=2.048MHz, TSYNC-Output */ + slic_write(spi, DS26522_TIOCR_ADDR, + DS26522_TIOCR_2048KHZ | DS26522_TIOCR_TSIO_OUT); + + /* Set E1TAF */ + slic_write(spi, DS26522_E1TAF_ADDR, DS26522_E1TAF_DEFAULT); + + /* Set E1TNAF register */ + slic_write(spi, DS26522_E1TNAF_ADDR, DS26522_E1TNAF_DEFAULT); + + /* Receive E1 Mode Framer Enable & init Done */ + slic_write(spi, DS26522_RMMR_ADDR, slic_read(spi, DS26522_RMMR_ADDR) | + DS26522_RMMR_INIT_DONE); + + /* Transmit E1 Mode Framer Enable & init Done */ + slic_write(spi, DS26522_TMMR_ADDR, slic_read(spi, DS26522_TMMR_ADDR) | + DS26522_TMMR_INIT_DONE); + + /* Configure LIU E1 mode */ + slic_write(spi, DS26522_LTRCR_ADDR, DS26522_LTRCR_E1); + + /* E1 Mode default 75 ohm w/Transmit Impedance Matlinking */ + slic_write(spi, DS26522_LTITSR_ADDR, + DS26522_LTITSR_TLIS_75OHM | DS26522_LTITSR_LBOS_75OHM); + + /* E1 Mode default 75 ohm Long Haul w/Receive Impedance Matlinking */ + slic_write(spi, DS26522_LRISMR_ADDR, + DS26522_LRISMR_75OHM | DS26522_LRISMR_MAX); + + /* Enable Transmit output */ + slic_write(spi, DS26522_LMCR_ADDR, DS26522_LMCR_TE); +} + +static int slic_ds26522_init_configure(struct spi_device *spi) +{ + u16 addr; + + /* set clock */ + slic_write(spi, DS26522_GTCCR_ADDR, DS26522_GTCCR_BPREFSEL_REFCLKIN | + DS26522_GTCCR_BFREQSEL_2048KHZ | + DS26522_GTCCR_FREQSEL_2048KHZ); + slic_write(spi, DS26522_GTCR2_ADDR, DS26522_GTCR2_TSSYNCOUT); + slic_write(spi, DS26522_GFCR_ADDR, DS26522_GFCR_BPCLK_2048KHZ); + + /* set gtcr */ + slic_write(spi, DS26522_GTCR1_ADDR, DS26522_GTCR1); + + /* Global LIU Software Reset Register */ + slic_write(spi, DS26522_GLSRR_ADDR, DS26522_GLSRR_RESET); + + /* Global Framer and BERT Software Reset Register */ + slic_write(spi, DS26522_GFSRR_ADDR, DS26522_GFSRR_RESET); + + usleep_range(100, 120); + + slic_write(spi, DS26522_GLSRR_ADDR, DS26522_GLSRR_NORMAL); + slic_write(spi, DS26522_GFSRR_ADDR, DS26522_GFSRR_NORMAL); + + /* Perform RX/TX SRESET,Reset receiver */ + slic_write(spi, DS26522_RMMR_ADDR, DS26522_RMMR_SFTRST); + + /* Reset tranceiver */ + slic_write(spi, DS26522_TMMR_ADDR, DS26522_TMMR_SFTRST); + + usleep_range(100, 120); + + /* Zero all Framer Registers */ + for (addr = DS26522_RF_ADDR_START; addr <= DS26522_RF_ADDR_END; + addr++) + slic_write(spi, addr, 0); + + for (addr = DS26522_TF_ADDR_START; addr <= DS26522_TF_ADDR_END; + addr++) + slic_write(spi, addr, 0); + + for (addr = DS26522_LIU_ADDR_START; addr <= DS26522_LIU_ADDR_END; + addr++) + slic_write(spi, addr, 0); + + for (addr = DS26522_BERT_ADDR_START; addr <= DS26522_BERT_ADDR_END; + addr++) + slic_write(spi, addr, 0); + + /* setup ds26522 for E1 specification */ + ds26522_e1_spec_config(spi); + + slic_write(spi, DS26522_GTCR1_ADDR, 0x00); + + return 0; +} + +static int slic_ds26522_remove(struct spi_device *spi) +{ + pr_info("DS26522 module uninstalled\n"); + return 0; +} + +static int slic_ds26522_probe(struct spi_device *spi) +{ + int ret = 0; + + g_spi = spi; + spi->bits_per_word = 8; + + if (!get_slic_product_code(spi)) + return ret; + + ret = slic_ds26522_init_configure(spi); + if (ret == 0) + pr_info("DS26522 cs%d configurated\n", spi->chip_select); + + return ret; +} + +static const struct of_device_id slic_ds26522_match[] = { + { + .compatible = "maxim,ds26522", + }, + {}, +}; + +static struct spi_driver slic_ds26522_driver = { + .driver = { + .name = "ds26522", + .bus = &spi_bus_type, + .owner = THIS_MODULE, + .of_match_table = slic_ds26522_match, + }, + .probe = slic_ds26522_probe, + .remove = slic_ds26522_remove, +}; + +static int __init slic_ds26522_init(void) +{ + return spi_register_driver(&slic_ds26522_driver); +} + +static void __exit slic_ds26522_exit(void) +{ + spi_unregister_driver(&slic_ds26522_driver); +} + +module_init(slic_ds26522_init); +module_exit(slic_ds26522_exit); diff --git a/drivers/net/wan/slic_ds26522.h b/drivers/net/wan/slic_ds26522.h new file mode 100644 index 0000000..22aa0ec --- /dev/null +++ b/drivers/net/wan/slic_ds26522.h @@ -0,0 +1,134 @@ +/* + * drivers/tdm/line_ctrl/slic_ds26522.h + * + * Copyright 2016 Freescale Semiconductor, Inc. + * + * Author: Zhao Qiang + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ + +#define DS26522_RF_ADDR_START 0x00 +#define DS26522_RF_ADDR_END 0xef +#define DS26522_GLB_ADDR_START 0xf0 +#define DS26522_GLB_ADDR_END 0xff +#define DS26522_TF_ADDR_START 0x100 +#define DS26522_TF_ADDR_END 0x1ef +#define DS26522_LIU_ADDR_START 0x1000 +#define DS26522_LIU_ADDR_END 0x101f +#define DS26522_TEST_ADDR_START 0x1008 +#define DS26522_TEST_ADDR_END 0x101f +#define DS26522_BERT_ADDR_START 0x1100 +#define DS26522_BERT_ADDR_END 0x110f + +#define DS26522_RMMR_ADDR 0x80 +#define DS26522_RCR1_ADDR 0x81 +#define DS26522_RCR3_ADDR 0x83 +#define DS26522_RIOCR_ADDR 0x84 + +#define DS26522_GTCR1_ADDR 0xf0 +#define DS26522_GFCR_ADDR 0xf1 +#define DS26522_GTCR2_ADDR 0xf2 +#define DS26522_GTCCR_ADDR 0xf3 +#define DS26522_GLSRR_ADDR 0xf5 +#define DS26522_GFSRR_ADDR 0xf6 +#define DS26522_IDR_ADDR 0xf8 + +#define DS26522_E1TAF_ADDR 0x164 +#define DS26522_E1TNAF_ADDR 0x165 +#define DS26522_TMMR_ADDR 0x180 +#define DS26522_TCR1_ADDR 0x181 +#define DS26522_TIOCR_ADDR 0x184 + +#define DS26522_LTRCR_ADDR 0x1000 +#define DS26522_LTITSR_ADDR 0x1001 +#define DS26522_LMCR_ADDR 0x1002 +#define DS26522_LRISMR_ADDR 0x1007 + +#define MAX_NUM_OF_CHANNELS 8 +#define PQ_MDS_8E1T1_BRD_REV 0x00 +#define PQ_MDS_8E1T1_PLD_REV 0x00 + +#define DS26522_GTCCR_BPREFSEL_REFCLKIN 0xa0 +#define DS26522_GTCCR_BFREQSEL_1544KHZ 0x08 +#define DS26522_GTCCR_FREQSEL_1544KHZ 0x04 +#define DS26522_GTCCR_BFREQSEL_2048KHZ 0x00 +#define DS26522_GTCCR_FREQSEL_2048KHZ 0x00 + +#define DS26522_GFCR_BPCLK_2048KHZ 0x00 + +#define DS26522_GTCR2_TSSYNCOUT 0x02 +#define DS26522_GTCR1 0x00 + +#define DS26522_GFSRR_RESET 0x01 +#define DS26522_GFSRR_NORMAL 0x00 + +#define DS26522_GLSRR_RESET 0x01 +#define DS26522_GLSRR_NORMAL 0x00 + +#define DS26522_RMMR_SFTRST 0x02 +#define DS26522_RMMR_FRM_EN 0x80 +#define DS26522_RMMR_INIT_DONE 0x40 +#define DS26522_RMMR_T1 0x00 +#define DS26522_RMMR_E1 0x01 + +#define DS26522_E1TAF_DEFAULT 0x1b +#define DS26522_E1TNAF_DEFAULT 0x40 + +#define DS26522_TMMR_SFTRST 0x02 +#define DS26522_TMMR_FRM_EN 0x80 +#define DS26522_TMMR_INIT_DONE 0x40 +#define DS26522_TMMR_T1 0x00 +#define DS26522_TMMR_E1 0x01 + +#define DS26522_RCR1_T1_SYNCT 0x80 +#define DS26522_RCR1_T1_RB8ZS 0x40 +#define DS26522_RCR1_T1_SYNCC 0x08 + +#define DS26522_RCR1_E1_HDB3 0x40 +#define DS26522_RCR1_E1_CCS 0x20 + +#define DS26522_RIOCR_1544KHZ 0x00 +#define DS26522_RIOCR_2048KHZ 0x10 +#define DS26522_RIOCR_RSIO_OUT 0x00 + +#define DS26522_RCR3_FLB 0x01 + +#define DS26522_TIOCR_1544KHZ 0x00 +#define DS26522_TIOCR_2048KHZ 0x10 +#define DS26522_TIOCR_TSIO_OUT 0x04 + +#define DS26522_TCR1_TB8ZS 0x04 + +#define DS26522_LTRCR_T1 0x02 +#define DS26522_LTRCR_E1 0x00 + +#define DS26522_LTITSR_TLIS_75OHM 0x00 +#define DS26522_LTITSR_LBOS_75OHM 0x00 +#define DS26522_LTITSR_TLIS_100OHM 0x10 +#define DS26522_LTITSR_TLIS_0DB_CSU 0x00 + +#define DS26522_LRISMR_75OHM 0x00 +#define DS26522_LRISMR_100OHM 0x10 +#define DS26522_LRISMR_MAX 0x03 + +#define DS26522_LMCR_TE 0x01 + +enum line_rate { + LINE_RATE_T1, /* T1 line rate (1.544 Mbps) */ + LINE_RATE_E1 /* E1 line rate (2.048 Mbps) */ +}; + +enum tdm_trans_mode { + NORMAL = 0, + FRAMER_LB +}; + +enum card_support_type { + LM_CARD = 0, + DS26522_CARD, + NO_CARD +}; -- 2.7.4