CONFIG_SYS_I2C_FTI2C010 is not enabled by anyone.
Commit 2852709676
("dm: i2c: Add a note to I2C drivers which need
conversion") prompted to convert this driver to DM before June 2017,
but not converted yet.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Heiko Schocher <hs@denx.de>
master
parent
1d14cbdcd8
commit
af6715bfb4
@ -1,340 +0,0 @@ |
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/*
|
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* Faraday I2C Controller |
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* |
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* (C) Copyright 2010 Faraday Technology |
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* Dante Su <dantesu@faraday-tech.com> |
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* |
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* SPDX-License-Identifier: GPL-2.0+ |
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* |
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* NOTE: This driver should be converted to driver model before June 2017. |
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* Please see doc/driver-model/i2c-howto.txt for instructions. |
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*/ |
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#include <common.h> |
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#include <asm/io.h> |
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#include <i2c.h> |
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#include "fti2c010.h" |
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#ifndef CONFIG_SYS_I2C_SPEED |
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#define CONFIG_SYS_I2C_SPEED 5000 |
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#endif |
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#ifndef CONFIG_SYS_I2C_SLAVE |
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#define CONFIG_SYS_I2C_SLAVE 0 |
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#endif |
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#ifndef CONFIG_FTI2C010_CLOCK |
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#define CONFIG_FTI2C010_CLOCK clk_get_rate("I2C") |
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#endif |
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#ifndef CONFIG_FTI2C010_TIMEOUT |
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#define CONFIG_FTI2C010_TIMEOUT 10 /* ms */ |
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#endif |
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/* 7-bit dev address + 1-bit read/write */ |
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#define I2C_RD(dev) ((((dev) << 1) & 0xfe) | 1) |
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#define I2C_WR(dev) (((dev) << 1) & 0xfe) |
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struct fti2c010_chip { |
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struct fti2c010_regs *regs; |
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}; |
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static struct fti2c010_chip chip_list[] = { |
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{ |
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.regs = (struct fti2c010_regs *)CONFIG_FTI2C010_BASE, |
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}, |
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#ifdef CONFIG_FTI2C010_BASE1 |
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{ |
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.regs = (struct fti2c010_regs *)CONFIG_FTI2C010_BASE1, |
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}, |
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#endif |
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#ifdef CONFIG_FTI2C010_BASE2 |
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{ |
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.regs = (struct fti2c010_regs *)CONFIG_FTI2C010_BASE2, |
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}, |
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#endif |
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#ifdef CONFIG_FTI2C010_BASE3 |
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{ |
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.regs = (struct fti2c010_regs *)CONFIG_FTI2C010_BASE3, |
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}, |
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#endif |
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}; |
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static int fti2c010_reset(struct fti2c010_chip *chip) |
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{ |
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ulong ts; |
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int ret = -1; |
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struct fti2c010_regs *regs = chip->regs; |
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writel(CR_I2CRST, ®s->cr); |
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for (ts = get_timer(0); get_timer(ts) < CONFIG_FTI2C010_TIMEOUT; ) { |
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if (!(readl(®s->cr) & CR_I2CRST)) { |
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ret = 0; |
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break; |
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} |
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} |
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if (ret) |
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printf("fti2c010: reset timeout\n"); |
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return ret; |
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} |
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static int fti2c010_wait(struct fti2c010_chip *chip, uint32_t mask) |
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{ |
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int ret = -1; |
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uint32_t stat, ts; |
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struct fti2c010_regs *regs = chip->regs; |
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for (ts = get_timer(0); get_timer(ts) < CONFIG_FTI2C010_TIMEOUT; ) { |
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stat = readl(®s->sr); |
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if ((stat & mask) == mask) { |
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ret = 0; |
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break; |
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} |
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} |
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return ret; |
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} |
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static unsigned int set_i2c_bus_speed(struct fti2c010_chip *chip, |
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unsigned int speed) |
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{ |
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struct fti2c010_regs *regs = chip->regs; |
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unsigned int clk = CONFIG_FTI2C010_CLOCK; |
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unsigned int gsr = 0; |
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unsigned int tsr = 32; |
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unsigned int div, rate; |
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for (div = 0; div < 0x3ffff; ++div) { |
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/* SCLout = PCLK/(2*(COUNT + 2) + GSR) */ |
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rate = clk / (2 * (div + 2) + gsr); |
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if (rate <= speed) |
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break; |
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} |
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writel(TGSR_GSR(gsr) | TGSR_TSR(tsr), ®s->tgsr); |
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writel(CDR_DIV(div), ®s->cdr); |
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return rate; |
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} |
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/*
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* Initialization, must be called once on start up, may be called |
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* repeatedly to change the speed and slave addresses. |
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*/ |
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static void fti2c010_init(struct i2c_adapter *adap, int speed, int slaveaddr) |
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{ |
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struct fti2c010_chip *chip = chip_list + adap->hwadapnr; |
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if (adap->init_done) |
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return; |
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#ifdef CONFIG_SYS_I2C_INIT_BOARD |
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/* Call board specific i2c bus reset routine before accessing the
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* environment, which might be in a chip on that bus. For details |
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* about this problem see doc/I2C_Edge_Conditions. |
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*/ |
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i2c_init_board(); |
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#endif |
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/* master init */ |
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fti2c010_reset(chip); |
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set_i2c_bus_speed(chip, speed); |
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/* slave init, don't care */ |
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} |
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/*
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* Probe the given I2C chip address. Returns 0 if a chip responded, |
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* not 0 on failure. |
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*/ |
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static int fti2c010_probe(struct i2c_adapter *adap, u8 dev) |
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{ |
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struct fti2c010_chip *chip = chip_list + adap->hwadapnr; |
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struct fti2c010_regs *regs = chip->regs; |
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int ret; |
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/* 1. Select slave device (7bits Address + 1bit R/W) */ |
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writel(I2C_WR(dev), ®s->dr); |
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writel(CR_ENABLE | CR_TBEN | CR_START, ®s->cr); |
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ret = fti2c010_wait(chip, SR_DT); |
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if (ret) |
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return ret; |
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/* 2. Select device register */ |
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writel(0, ®s->dr); |
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writel(CR_ENABLE | CR_TBEN, ®s->cr); |
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ret = fti2c010_wait(chip, SR_DT); |
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return ret; |
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} |
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static void to_i2c_addr(u8 *buf, uint32_t addr, int alen) |
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{ |
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int i, shift; |
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if (!buf || alen <= 0) |
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return; |
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/* MSB first */ |
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i = 0; |
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shift = (alen - 1) * 8; |
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while (alen-- > 0) { |
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buf[i] = (u8)(addr >> shift); |
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shift -= 8; |
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} |
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} |
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static int fti2c010_read(struct i2c_adapter *adap, |
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u8 dev, uint addr, int alen, uchar *buf, int len) |
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{ |
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struct fti2c010_chip *chip = chip_list + adap->hwadapnr; |
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struct fti2c010_regs *regs = chip->regs; |
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int ret, pos; |
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uchar paddr[4] = { 0 }; |
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to_i2c_addr(paddr, addr, alen); |
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/*
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* Phase A. Set register address |
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*/ |
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/* A.1 Select slave device (7bits Address + 1bit R/W) */ |
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writel(I2C_WR(dev), ®s->dr); |
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writel(CR_ENABLE | CR_TBEN | CR_START, ®s->cr); |
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ret = fti2c010_wait(chip, SR_DT); |
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if (ret) |
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return ret; |
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/* A.2 Select device register */ |
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for (pos = 0; pos < alen; ++pos) { |
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uint32_t ctrl = CR_ENABLE | CR_TBEN; |
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writel(paddr[pos], ®s->dr); |
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writel(ctrl, ®s->cr); |
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ret = fti2c010_wait(chip, SR_DT); |
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if (ret) |
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return ret; |
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} |
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/*
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* Phase B. Get register data |
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*/ |
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/* B.1 Select slave device (7bits Address + 1bit R/W) */ |
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writel(I2C_RD(dev), ®s->dr); |
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writel(CR_ENABLE | CR_TBEN | CR_START, ®s->cr); |
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ret = fti2c010_wait(chip, SR_DT); |
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if (ret) |
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return ret; |
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/* B.2 Get register data */ |
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for (pos = 0; pos < len; ++pos) { |
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uint32_t ctrl = CR_ENABLE | CR_TBEN; |
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uint32_t stat = SR_DR; |
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if (pos == len - 1) { |
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ctrl |= CR_NAK | CR_STOP; |
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stat |= SR_ACK; |
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} |
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writel(ctrl, ®s->cr); |
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ret = fti2c010_wait(chip, stat); |
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if (ret) |
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break; |
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buf[pos] = (uchar)(readl(®s->dr) & 0xFF); |
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} |
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return ret; |
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} |
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static int fti2c010_write(struct i2c_adapter *adap, |
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u8 dev, uint addr, int alen, u8 *buf, int len) |
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{ |
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struct fti2c010_chip *chip = chip_list + adap->hwadapnr; |
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struct fti2c010_regs *regs = chip->regs; |
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int ret, pos; |
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uchar paddr[4] = { 0 }; |
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to_i2c_addr(paddr, addr, alen); |
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/*
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* Phase A. Set register address |
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* |
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* A.1 Select slave device (7bits Address + 1bit R/W) |
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*/ |
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writel(I2C_WR(dev), ®s->dr); |
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writel(CR_ENABLE | CR_TBEN | CR_START, ®s->cr); |
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ret = fti2c010_wait(chip, SR_DT); |
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if (ret) |
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return ret; |
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/* A.2 Select device register */ |
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for (pos = 0; pos < alen; ++pos) { |
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uint32_t ctrl = CR_ENABLE | CR_TBEN; |
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writel(paddr[pos], ®s->dr); |
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writel(ctrl, ®s->cr); |
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ret = fti2c010_wait(chip, SR_DT); |
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if (ret) |
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return ret; |
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} |
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/*
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* Phase B. Set register data |
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*/ |
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for (pos = 0; pos < len; ++pos) { |
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uint32_t ctrl = CR_ENABLE | CR_TBEN; |
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if (pos == len - 1) |
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ctrl |= CR_STOP; |
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writel(buf[pos], ®s->dr); |
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writel(ctrl, ®s->cr); |
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ret = fti2c010_wait(chip, SR_DT); |
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if (ret) |
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break; |
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} |
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return ret; |
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} |
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static unsigned int fti2c010_set_bus_speed(struct i2c_adapter *adap, |
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unsigned int speed) |
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{ |
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struct fti2c010_chip *chip = chip_list + adap->hwadapnr; |
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int ret; |
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fti2c010_reset(chip); |
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ret = set_i2c_bus_speed(chip, speed); |
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return ret; |
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} |
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/*
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* Register i2c adapters |
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*/ |
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U_BOOT_I2C_ADAP_COMPLETE(i2c_0, fti2c010_init, fti2c010_probe, fti2c010_read, |
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fti2c010_write, fti2c010_set_bus_speed, |
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CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE, |
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0) |
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#ifdef CONFIG_FTI2C010_BASE1 |
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U_BOOT_I2C_ADAP_COMPLETE(i2c_1, fti2c010_init, fti2c010_probe, fti2c010_read, |
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fti2c010_write, fti2c010_set_bus_speed, |
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CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE, |
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1) |
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#endif |
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#ifdef CONFIG_FTI2C010_BASE2 |
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U_BOOT_I2C_ADAP_COMPLETE(i2c_2, fti2c010_init, fti2c010_probe, fti2c010_read, |
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fti2c010_write, fti2c010_set_bus_speed, |
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CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE, |
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2) |
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#endif |
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#ifdef CONFIG_FTI2C010_BASE3 |
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U_BOOT_I2C_ADAP_COMPLETE(i2c_3, fti2c010_init, fti2c010_probe, fti2c010_read, |
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fti2c010_write, fti2c010_set_bus_speed, |
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CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE, |
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3) |
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#endif |
@ -1,80 +0,0 @@ |
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/*
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* Faraday I2C Controller |
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* |
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* (C) Copyright 2010 Faraday Technology |
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* Dante Su <dantesu@faraday-tech.com> |
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* |
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* SPDX-License-Identifier: GPL-2.0+ |
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*/ |
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#ifndef __FTI2C010_H |
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#define __FTI2C010_H |
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/*
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* FTI2C010 registers |
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*/ |
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struct fti2c010_regs { |
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uint32_t cr; /* 0x00: control register */ |
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uint32_t sr; /* 0x04: status register */ |
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uint32_t cdr; /* 0x08: clock division register */ |
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uint32_t dr; /* 0x0c: data register */ |
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uint32_t sar; /* 0x10: slave address register */ |
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uint32_t tgsr;/* 0x14: time & glitch suppression register */ |
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uint32_t bmr; /* 0x18: bus monitor register */ |
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uint32_t rsvd[5]; |
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uint32_t revr;/* 0x30: revision register */ |
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}; |
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/*
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* control register |
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*/ |
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#define CR_ALIRQ 0x2000 /* arbitration lost interrupt (master) */ |
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#define CR_SAMIRQ 0x1000 /* slave address match interrupt (slave) */ |
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#define CR_STOPIRQ 0x800 /* stop condition interrupt (slave) */ |
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#define CR_NAKRIRQ 0x400 /* NACK response interrupt (master) */ |
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#define CR_DRIRQ 0x200 /* rx interrupt (both) */ |
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#define CR_DTIRQ 0x100 /* tx interrupt (both) */ |
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#define CR_TBEN 0x80 /* tx enable (both) */ |
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#define CR_NAK 0x40 /* NACK (both) */ |
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#define CR_STOP 0x20 /* stop (master) */ |
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#define CR_START 0x10 /* start (master) */ |
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#define CR_GCEN 0x8 /* general call support (slave) */ |
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#define CR_SCLEN 0x4 /* enable clock out (master) */ |
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#define CR_I2CEN 0x2 /* enable I2C (both) */ |
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#define CR_I2CRST 0x1 /* reset I2C (both) */ |
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#define CR_ENABLE \ |
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(CR_ALIRQ | CR_NAKRIRQ | CR_DRIRQ | CR_DTIRQ | CR_SCLEN | CR_I2CEN) |
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/*
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* status register |
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*/ |
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#define SR_CLRAL 0x400 /* clear arbitration lost */ |
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#define SR_CLRGC 0x200 /* clear general call */ |
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#define SR_CLRSAM 0x100 /* clear slave address match */ |
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#define SR_CLRSTOP 0x80 /* clear stop */ |
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#define SR_CLRNAKR 0x40 /* clear NACK respond */ |
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#define SR_DR 0x20 /* rx ready */ |
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#define SR_DT 0x10 /* tx done */ |
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#define SR_BB 0x8 /* bus busy */ |
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#define SR_BUSY 0x4 /* chip busy */ |
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#define SR_ACK 0x2 /* ACK/NACK received */ |
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#define SR_RW 0x1 /* set when master-rx or slave-tx mode */ |
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/*
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* clock division register |
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*/ |
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#define CDR_DIV(n) ((n) & 0x3ffff) |
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/*
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* time & glitch suppression register |
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*/ |
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#define TGSR_GSR(n) (((n) & 0x7) << 10) |
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#define TGSR_TSR(n) ((n) & 0x3ff) |
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/*
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* bus monitor register |
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*/ |
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#define BMR_SCL 0x2 /* SCL is pull-up */ |
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#define BMR_SDA 0x1 /* SDA is pull-up */ |
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#endif /* __FTI2C010_H */ |
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Reference in new issue