[PATCH v2] Maxim/driver: Add driver for maxim ds26522
From: Zhao Qiang
Date: Sun Jun 26 2016 - 21:41:09 EST
Signed-off-by: Zhao Qiang <qiang.zhao@xxxxxxx>
---
Changes for v2:
- remove MODULE_DESCRIPTION of driver
- add dependence on 'FSL_SOC || ARCH_MXC || ARCH_LAYERSCAPE"
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<qiang.zhao@xxxxxxx>
+ *
+ * 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 <linux/bitrev.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/kthread.h>
+#include <linux/spi/spi.h>
+#include <linux/wait.h>
+#include <linux/param.h>
+#include <linux/delay.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/io.h>
+#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<B45475@xxxxxxxxxxxxx>");
+
+/* 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 <B45475@xxxxxxxxxxxxx>
+ *
+ * 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
+};
--
2.1.0.27.g96db324