Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Zhao Qiang | 876 | 94.60% | 1 | 12.50% |
Javier Martinez Canillas | 39 | 4.21% | 2 | 25.00% |
Amit Kumar Mahapatra | 5 | 0.54% | 1 | 12.50% |
Wei Yongjun | 2 | 0.22% | 1 | 12.50% |
Thomas Gleixner | 2 | 0.22% | 1 | 12.50% |
Colin Ian King | 1 | 0.11% | 1 | 12.50% |
Uwe Kleine-König | 1 | 0.11% | 1 | 12.50% |
Total | 926 | 8 |
// SPDX-License-Identifier: GPL-2.0-or-later /* * drivers/net/wan/slic_ds26522.c * * Copyright (C) 2016 Freescale Semiconductor, Inc. * * Author:Zhao Qiang<qiang.zhao@nxp.com> */ #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 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@freescale.com>"); /* 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 void slic_ds26522_remove(struct spi_device *spi) { pr_info("DS26522 module uninstalled\n"); } 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 configured\n", spi_get_chipselect(spi, 0)); return ret; } static const struct spi_device_id slic_ds26522_id[] = { { .name = "ds26522" }, { /* sentinel */ }, }; MODULE_DEVICE_TABLE(spi, slic_ds26522_id); static const struct of_device_id slic_ds26522_match[] = { { .compatible = "maxim,ds26522", }, {}, }; MODULE_DEVICE_TABLE(of, slic_ds26522_match); static struct spi_driver slic_ds26522_driver = { .driver = { .name = "ds26522", .bus = &spi_bus_type, .of_match_table = slic_ds26522_match, }, .probe = slic_ds26522_probe, .remove = slic_ds26522_remove, .id_table = slic_ds26522_id, }; module_spi_driver(slic_ds26522_driver);
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