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Diffstat (limited to 'drivers/i2c/fti2c010.c')
-rw-r--r--drivers/i2c/fti2c010.c340
1 files changed, 0 insertions, 340 deletions
diff --git a/drivers/i2c/fti2c010.c b/drivers/i2c/fti2c010.c
deleted file mode 100644
index 4da959f..0000000
--- a/drivers/i2c/fti2c010.c
+++ /dev/null
@@ -1,340 +0,0 @@
-/*
- * Faraday I2C Controller
- *
- * (C) Copyright 2010 Faraday Technology
- * Dante Su <dantesu@faraday-tech.com>
- *
- * SPDX-License-Identifier: GPL-2.0+
- *
- * NOTE: This driver should be converted to driver model before June 2017.
- * Please see doc/driver-model/i2c-howto.txt for instructions.
- */
-
-#include <common.h>
-#include <asm/io.h>
-#include <i2c.h>
-
-#include "fti2c010.h"
-
-#ifndef CONFIG_SYS_I2C_SPEED
-#define CONFIG_SYS_I2C_SPEED 5000
-#endif
-
-#ifndef CONFIG_SYS_I2C_SLAVE
-#define CONFIG_SYS_I2C_SLAVE 0
-#endif
-
-#ifndef CONFIG_FTI2C010_CLOCK
-#define CONFIG_FTI2C010_CLOCK clk_get_rate("I2C")
-#endif
-
-#ifndef CONFIG_FTI2C010_TIMEOUT
-#define CONFIG_FTI2C010_TIMEOUT 10 /* ms */
-#endif
-
-/* 7-bit dev address + 1-bit read/write */
-#define I2C_RD(dev) ((((dev) << 1) & 0xfe) | 1)
-#define I2C_WR(dev) (((dev) << 1) & 0xfe)
-
-struct fti2c010_chip {
- struct fti2c010_regs *regs;
-};
-
-static struct fti2c010_chip chip_list[] = {
- {
- .regs = (struct fti2c010_regs *)CONFIG_FTI2C010_BASE,
- },
-#ifdef CONFIG_FTI2C010_BASE1
- {
- .regs = (struct fti2c010_regs *)CONFIG_FTI2C010_BASE1,
- },
-#endif
-#ifdef CONFIG_FTI2C010_BASE2
- {
- .regs = (struct fti2c010_regs *)CONFIG_FTI2C010_BASE2,
- },
-#endif
-#ifdef CONFIG_FTI2C010_BASE3
- {
- .regs = (struct fti2c010_regs *)CONFIG_FTI2C010_BASE3,
- },
-#endif
-};
-
-static int fti2c010_reset(struct fti2c010_chip *chip)
-{
- ulong ts;
- int ret = -1;
- struct fti2c010_regs *regs = chip->regs;
-
- writel(CR_I2CRST, &regs->cr);
- for (ts = get_timer(0); get_timer(ts) < CONFIG_FTI2C010_TIMEOUT; ) {
- if (!(readl(&regs->cr) & CR_I2CRST)) {
- ret = 0;
- break;
- }
- }
-
- if (ret)
- printf("fti2c010: reset timeout\n");
-
- return ret;
-}
-
-static int fti2c010_wait(struct fti2c010_chip *chip, uint32_t mask)
-{
- int ret = -1;
- uint32_t stat, ts;
- struct fti2c010_regs *regs = chip->regs;
-
- for (ts = get_timer(0); get_timer(ts) < CONFIG_FTI2C010_TIMEOUT; ) {
- stat = readl(&regs->sr);
- if ((stat & mask) == mask) {
- ret = 0;
- break;
- }
- }
-
- return ret;
-}
-
-static unsigned int set_i2c_bus_speed(struct fti2c010_chip *chip,
- unsigned int speed)
-{
- struct fti2c010_regs *regs = chip->regs;
- unsigned int clk = CONFIG_FTI2C010_CLOCK;
- unsigned int gsr = 0;
- unsigned int tsr = 32;
- unsigned int div, rate;
-
- for (div = 0; div < 0x3ffff; ++div) {
- /* SCLout = PCLK/(2*(COUNT + 2) + GSR) */
- rate = clk / (2 * (div + 2) + gsr);
- if (rate <= speed)
- break;
- }
-
- writel(TGSR_GSR(gsr) | TGSR_TSR(tsr), &regs->tgsr);
- writel(CDR_DIV(div), &regs->cdr);
-
- return rate;
-}
-
-/*
- * Initialization, must be called once on start up, may be called
- * repeatedly to change the speed and slave addresses.
- */
-static void fti2c010_init(struct i2c_adapter *adap, int speed, int slaveaddr)
-{
- struct fti2c010_chip *chip = chip_list + adap->hwadapnr;
-
- if (adap->init_done)
- return;
-
-#ifdef CONFIG_SYS_I2C_INIT_BOARD
- /* Call board specific i2c bus reset routine before accessing the
- * environment, which might be in a chip on that bus. For details
- * about this problem see doc/I2C_Edge_Conditions.
- */
- i2c_init_board();
-#endif
-
- /* master init */
-
- fti2c010_reset(chip);
-
- set_i2c_bus_speed(chip, speed);
-
- /* slave init, don't care */
-}
-
-/*
- * Probe the given I2C chip address. Returns 0 if a chip responded,
- * not 0 on failure.
- */
-static int fti2c010_probe(struct i2c_adapter *adap, u8 dev)
-{
- struct fti2c010_chip *chip = chip_list + adap->hwadapnr;
- struct fti2c010_regs *regs = chip->regs;
- int ret;
-
- /* 1. Select slave device (7bits Address + 1bit R/W) */
- writel(I2C_WR(dev), &regs->dr);
- writel(CR_ENABLE | CR_TBEN | CR_START, &regs->cr);
- ret = fti2c010_wait(chip, SR_DT);
- if (ret)
- return ret;
-
- /* 2. Select device register */
- writel(0, &regs->dr);
- writel(CR_ENABLE | CR_TBEN, &regs->cr);
- ret = fti2c010_wait(chip, SR_DT);
-
- return ret;
-}
-
-static void to_i2c_addr(u8 *buf, uint32_t addr, int alen)
-{
- int i, shift;
-
- if (!buf || alen <= 0)
- return;
-
- /* MSB first */
- i = 0;
- shift = (alen - 1) * 8;
- while (alen-- > 0) {
- buf[i] = (u8)(addr >> shift);
- shift -= 8;
- }
-}
-
-static int fti2c010_read(struct i2c_adapter *adap,
- u8 dev, uint addr, int alen, uchar *buf, int len)
-{
- struct fti2c010_chip *chip = chip_list + adap->hwadapnr;
- struct fti2c010_regs *regs = chip->regs;
- int ret, pos;
- uchar paddr[4] = { 0 };
-
- to_i2c_addr(paddr, addr, alen);
-
- /*
- * Phase A. Set register address
- */
-
- /* A.1 Select slave device (7bits Address + 1bit R/W) */
- writel(I2C_WR(dev), &regs->dr);
- writel(CR_ENABLE | CR_TBEN | CR_START, &regs->cr);
- ret = fti2c010_wait(chip, SR_DT);
- if (ret)
- return ret;
-
- /* A.2 Select device register */
- for (pos = 0; pos < alen; ++pos) {
- uint32_t ctrl = CR_ENABLE | CR_TBEN;
-
- writel(paddr[pos], &regs->dr);
- writel(ctrl, &regs->cr);
- ret = fti2c010_wait(chip, SR_DT);
- if (ret)
- return ret;
- }
-
- /*
- * Phase B. Get register data
- */
-
- /* B.1 Select slave device (7bits Address + 1bit R/W) */
- writel(I2C_RD(dev), &regs->dr);
- writel(CR_ENABLE | CR_TBEN | CR_START, &regs->cr);
- ret = fti2c010_wait(chip, SR_DT);
- if (ret)
- return ret;
-
- /* B.2 Get register data */
- for (pos = 0; pos < len; ++pos) {
- uint32_t ctrl = CR_ENABLE | CR_TBEN;
- uint32_t stat = SR_DR;
-
- if (pos == len - 1) {
- ctrl |= CR_NAK | CR_STOP;
- stat |= SR_ACK;
- }
- writel(ctrl, &regs->cr);
- ret = fti2c010_wait(chip, stat);
- if (ret)
- break;
- buf[pos] = (uchar)(readl(&regs->dr) & 0xFF);
- }
-
- return ret;
-}
-
-static int fti2c010_write(struct i2c_adapter *adap,
- u8 dev, uint addr, int alen, u8 *buf, int len)
-{
- struct fti2c010_chip *chip = chip_list + adap->hwadapnr;
- struct fti2c010_regs *regs = chip->regs;
- int ret, pos;
- uchar paddr[4] = { 0 };
-
- to_i2c_addr(paddr, addr, alen);
-
- /*
- * Phase A. Set register address
- *
- * A.1 Select slave device (7bits Address + 1bit R/W)
- */
- writel(I2C_WR(dev), &regs->dr);
- writel(CR_ENABLE | CR_TBEN | CR_START, &regs->cr);
- ret = fti2c010_wait(chip, SR_DT);
- if (ret)
- return ret;
-
- /* A.2 Select device register */
- for (pos = 0; pos < alen; ++pos) {
- uint32_t ctrl = CR_ENABLE | CR_TBEN;
-
- writel(paddr[pos], &regs->dr);
- writel(ctrl, &regs->cr);
- ret = fti2c010_wait(chip, SR_DT);
- if (ret)
- return ret;
- }
-
- /*
- * Phase B. Set register data
- */
- for (pos = 0; pos < len; ++pos) {
- uint32_t ctrl = CR_ENABLE | CR_TBEN;
-
- if (pos == len - 1)
- ctrl |= CR_STOP;
- writel(buf[pos], &regs->dr);
- writel(ctrl, &regs->cr);
- ret = fti2c010_wait(chip, SR_DT);
- if (ret)
- break;
- }
-
- return ret;
-}
-
-static unsigned int fti2c010_set_bus_speed(struct i2c_adapter *adap,
- unsigned int speed)
-{
- struct fti2c010_chip *chip = chip_list + adap->hwadapnr;
- int ret;
-
- fti2c010_reset(chip);
- ret = set_i2c_bus_speed(chip, speed);
-
- return ret;
-}
-
-/*
- * Register i2c adapters
- */
-U_BOOT_I2C_ADAP_COMPLETE(i2c_0, fti2c010_init, fti2c010_probe, fti2c010_read,
- fti2c010_write, fti2c010_set_bus_speed,
- CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE,
- 0)
-#ifdef CONFIG_FTI2C010_BASE1
-U_BOOT_I2C_ADAP_COMPLETE(i2c_1, fti2c010_init, fti2c010_probe, fti2c010_read,
- fti2c010_write, fti2c010_set_bus_speed,
- CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE,
- 1)
-#endif
-#ifdef CONFIG_FTI2C010_BASE2
-U_BOOT_I2C_ADAP_COMPLETE(i2c_2, fti2c010_init, fti2c010_probe, fti2c010_read,
- fti2c010_write, fti2c010_set_bus_speed,
- CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE,
- 2)
-#endif
-#ifdef CONFIG_FTI2C010_BASE3
-U_BOOT_I2C_ADAP_COMPLETE(i2c_3, fti2c010_init, fti2c010_probe, fti2c010_read,
- fti2c010_write, fti2c010_set_bus_speed,
- CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE,
- 3)
-#endif
generated by cgit v1.1 at 2024-08-14 14:04:51 +0000