diff options
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/Makefile | 2 | ||||
| -rw-r--r-- | drivers/i2c/sh_sh7734_i2c.c | 376 | ||||
| -rw-r--r-- | drivers/i2c/tsi108_i2c.c | 275 |
3 files changed, 0 insertions, 653 deletions
diff --git a/drivers/i2c/Makefile b/drivers/i2c/Makefile index 8bb3c18b572..da368cc02a0 100644 --- a/drivers/i2c/Makefile +++ b/drivers/i2c/Makefile @@ -9,8 +9,6 @@ obj-$(CONFIG_$(SPL_)I2C_CROS_EC_TUNNEL) += cros_ec_tunnel.o obj-$(CONFIG_$(SPL_)I2C_CROS_EC_LDO) += cros_ec_ldo.o obj-$(CONFIG_I2C_MV) += mv_i2c.o -obj-$(CONFIG_TSI108_I2C) += tsi108_i2c.o -obj-$(CONFIG_SH_SH7734_I2C) += sh_sh7734_i2c.o obj-$(CONFIG_SYS_I2C) += i2c_core.o obj-$(CONFIG_SYS_I2C_ASPEED) += ast_i2c.o obj-$(CONFIG_SYS_I2C_AT91) += at91_i2c.o diff --git a/drivers/i2c/sh_sh7734_i2c.c b/drivers/i2c/sh_sh7734_i2c.c deleted file mode 100644 index 6fe356baca8..00000000000 --- a/drivers/i2c/sh_sh7734_i2c.c +++ /dev/null @@ -1,376 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0+ -/* - * Copyright (C) 2012 Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com> - * Copyright (C) 2012 Renesas Solutions Corp. - * - * 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 <i2c.h> -#include <asm/io.h> - -struct sh_i2c { - u8 iccr1; - u8 iccr2; - u8 icmr; - u8 icier; - u8 icsr; - u8 sar; - u8 icdrt; - u8 icdrr; - u8 nf2cyc; - u8 __pad0; - u8 __pad1; -}; - -static struct sh_i2c *base; -static u8 iccr1_cks, nf2cyc; - -/* ICCR1 */ -#define SH_I2C_ICCR1_ICE (1 << 7) -#define SH_I2C_ICCR1_RCVD (1 << 6) -#define SH_I2C_ICCR1_MST (1 << 5) -#define SH_I2C_ICCR1_TRS (1 << 4) -#define SH_I2C_ICCR1_MTRS \ - (SH_I2C_ICCR1_MST | SH_I2C_ICCR1_TRS) - -/* ICCR1 */ -#define SH_I2C_ICCR2_BBSY (1 << 7) -#define SH_I2C_ICCR2_SCP (1 << 6) -#define SH_I2C_ICCR2_SDAO (1 << 5) -#define SH_I2C_ICCR2_SDAOP (1 << 4) -#define SH_I2C_ICCR2_SCLO (1 << 3) -#define SH_I2C_ICCR2_IICRST (1 << 1) - -#define SH_I2C_ICIER_TIE (1 << 7) -#define SH_I2C_ICIER_TEIE (1 << 6) -#define SH_I2C_ICIER_RIE (1 << 5) -#define SH_I2C_ICIER_NAKIE (1 << 4) -#define SH_I2C_ICIER_STIE (1 << 3) -#define SH_I2C_ICIER_ACKE (1 << 2) -#define SH_I2C_ICIER_ACKBR (1 << 1) -#define SH_I2C_ICIER_ACKBT (1 << 0) - -#define SH_I2C_ICSR_TDRE (1 << 7) -#define SH_I2C_ICSR_TEND (1 << 6) -#define SH_I2C_ICSR_RDRF (1 << 5) -#define SH_I2C_ICSR_NACKF (1 << 4) -#define SH_I2C_ICSR_STOP (1 << 3) -#define SH_I2C_ICSR_ALOVE (1 << 2) -#define SH_I2C_ICSR_AAS (1 << 1) -#define SH_I2C_ICSR_ADZ (1 << 0) - -#define IRQ_WAIT 1000 - -static void sh_i2c_send_stop(struct sh_i2c *base) -{ - clrbits_8(&base->iccr2, SH_I2C_ICCR2_BBSY | SH_I2C_ICCR2_SCP); -} - -static int check_icsr_bits(struct sh_i2c *base, u8 bits) -{ - int i; - - for (i = 0; i < IRQ_WAIT; i++) { - if (bits & readb(&base->icsr)) - return 0; - udelay(10); - } - - return 1; -} - -static int check_stop(struct sh_i2c *base) -{ - int ret = check_icsr_bits(base, SH_I2C_ICSR_STOP); - clrbits_8(&base->icsr, SH_I2C_ICSR_STOP); - - return ret; -} - -static int check_tend(struct sh_i2c *base, int stop) -{ - int ret = check_icsr_bits(base, SH_I2C_ICSR_TEND); - - if (stop) { - clrbits_8(&base->icsr, SH_I2C_ICSR_STOP); - sh_i2c_send_stop(base); - } - - clrbits_8(&base->icsr, SH_I2C_ICSR_TEND); - return ret; -} - -static int check_tdre(struct sh_i2c *base) -{ - return check_icsr_bits(base, SH_I2C_ICSR_TDRE); -} - -static int check_rdrf(struct sh_i2c *base) -{ - return check_icsr_bits(base, SH_I2C_ICSR_RDRF); -} - -static int check_bbsy(struct sh_i2c *base) -{ - int i; - - for (i = 0 ; i < IRQ_WAIT ; i++) { - if (!(SH_I2C_ICCR2_BBSY & readb(&base->iccr2))) - return 0; - udelay(10); - } - return 1; -} - -static int check_ackbr(struct sh_i2c *base) -{ - int i; - - for (i = 0 ; i < IRQ_WAIT ; i++) { - if (!(SH_I2C_ICIER_ACKBR & readb(&base->icier))) - return 0; - udelay(10); - } - - return 1; -} - -static void sh_i2c_reset(struct sh_i2c *base) -{ - setbits_8(&base->iccr2, SH_I2C_ICCR2_IICRST); - - udelay(100); - - clrbits_8(&base->iccr2, SH_I2C_ICCR2_IICRST); -} - -static int i2c_set_addr(struct sh_i2c *base, u8 id, u8 reg) -{ - if (check_bbsy(base)) { - puts("i2c bus busy\n"); - goto fail; - } - - setbits_8(&base->iccr1, SH_I2C_ICCR1_MTRS); - clrsetbits_8(&base->iccr2, SH_I2C_ICCR2_SCP, SH_I2C_ICCR2_BBSY); - - writeb((id << 1), &base->icdrt); - - if (check_tend(base, 0)) { - puts("TEND check fail...\n"); - goto fail; - } - - if (check_ackbr(base)) { - check_tend(base, 0); - sh_i2c_send_stop(base); - goto fail; - } - - writeb(reg, &base->icdrt); - - if (check_tdre(base)) { - puts("TDRE check fail...\n"); - goto fail; - } - - if (check_tend(base, 0)) { - puts("TEND check fail...\n"); - goto fail; - } - - return 0; -fail: - - return 1; -} - -static int -i2c_raw_write(struct sh_i2c *base, u8 id, u8 reg, u8 *val, int size) -{ - int i; - - if (i2c_set_addr(base, id, reg)) { - puts("Fail set slave address\n"); - return 1; - } - - for (i = 0; i < size; i++) { - writeb(val[i], &base->icdrt); - check_tdre(base); - } - - check_tend(base, 1); - check_stop(base); - - udelay(100); - - clrbits_8(&base->iccr1, SH_I2C_ICCR1_MTRS); - clrbits_8(&base->icsr, SH_I2C_ICSR_TDRE); - sh_i2c_reset(base); - - return 0; -} - -static u8 i2c_raw_read(struct sh_i2c *base, u8 id, u8 reg) -{ - u8 ret = 0; - - if (i2c_set_addr(base, id, reg)) { - puts("Fail set slave address\n"); - goto fail; - } - - clrsetbits_8(&base->iccr2, SH_I2C_ICCR2_SCP, SH_I2C_ICCR2_BBSY); - writeb((id << 1) | 1, &base->icdrt); - - if (check_tend(base, 0)) - puts("TDRE check fail...\n"); - - clrsetbits_8(&base->iccr1, SH_I2C_ICCR1_TRS, SH_I2C_ICCR1_MST); - clrbits_8(&base->icsr, SH_I2C_ICSR_TDRE); - setbits_8(&base->icier, SH_I2C_ICIER_ACKBT); - setbits_8(&base->iccr1, SH_I2C_ICCR1_RCVD); - - /* read data (dummy) */ - ret = readb(&base->icdrr); - - if (check_rdrf(base)) { - puts("check RDRF error\n"); - goto fail; - } - - clrbits_8(&base->icsr, SH_I2C_ICSR_STOP); - udelay(1000); - - sh_i2c_send_stop(base); - - if (check_stop(base)) { - puts("check STOP error\n"); - goto fail; - } - - clrbits_8(&base->iccr1, SH_I2C_ICCR1_MTRS); - clrbits_8(&base->icsr, SH_I2C_ICSR_TDRE); - - /* data read */ - ret = readb(&base->icdrr); - -fail: - clrbits_8(&base->iccr1, SH_I2C_ICCR1_RCVD); - - return ret; -} - -#ifdef CONFIG_I2C_MULTI_BUS -static unsigned int current_bus; - -/** - * i2c_set_bus_num - change active I2C bus - * @bus: bus index, zero based - * @returns: 0 on success, non-0 on failure - */ -int i2c_set_bus_num(unsigned int bus) -{ - switch (bus) { - case 0: - base = (void *)CONFIG_SH_I2C_BASE0; - break; - case 1: - base = (void *)CONFIG_SH_I2C_BASE1; - break; - default: - printf("Bad bus: %d\n", bus); - return -1; - } - - current_bus = bus; - - return 0; -} - -/** - * i2c_get_bus_num - returns index of active I2C bus - */ -unsigned int i2c_get_bus_num(void) -{ - return current_bus; -} -#endif - -void i2c_init(int speed, int slaveaddr) -{ -#ifdef CONFIG_I2C_MULTI_BUS - current_bus = 0; -#endif - base = (struct sh_i2c *)CONFIG_SH_I2C_BASE0; - - if (speed == 400000) - iccr1_cks = 0x07; - else - iccr1_cks = 0x0F; - - nf2cyc = 1; - - /* Reset */ - sh_i2c_reset(base); - - /* ICE enable and set clock */ - writeb(SH_I2C_ICCR1_ICE | iccr1_cks, &base->iccr1); - writeb(nf2cyc, &base->nf2cyc); -} - -/* - * i2c_read: - Read multiple bytes from an i2c device - * - * The higher level routines take into account that this function is only - * called with len < page length of the device (see configuration file) - * - * @chip: address of the chip which is to be read - * @addr: i2c data address within the chip - * @alen: length of the i2c data address (1..2 bytes) - * @buffer: where to write the data - * @len: how much byte do we want to read - * @return: 0 in case of success - */ -int i2c_read(u8 chip, u32 addr, int alen, u8 *buffer, int len) -{ - int i = 0; - for (i = 0; i < len; i++) - buffer[i] = i2c_raw_read(base, chip, addr + i); - - return 0; -} - -/* - * i2c_write: - Write multiple bytes to an i2c device - * - * The higher level routines take into account that this function is only - * called with len < page length of the device (see configuration file) - * - * @chip: address of the chip which is to be written - * @addr: i2c data address within the chip - * @alen: length of the i2c data address (1..2 bytes) - * @buffer: where to find the data to be written - * @len: how much byte do we want to read - * @return: 0 in case of success - */ -int i2c_write(u8 chip, u32 addr, int alen, u8 *buffer, int len) -{ - return i2c_raw_write(base, chip, addr, buffer, len); -} - -/* - * i2c_probe: - Test if a chip answers for a given i2c address - * - * @chip: address of the chip which is searched for - * @return: 0 if a chip was found, -1 otherwhise - */ -int i2c_probe(u8 chip) -{ - u8 byte; - return i2c_read(chip, 0, 0, &byte, 1); -} diff --git a/drivers/i2c/tsi108_i2c.c b/drivers/i2c/tsi108_i2c.c deleted file mode 100644 index 208c0900ef8..00000000000 --- a/drivers/i2c/tsi108_i2c.c +++ /dev/null @@ -1,275 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0+ -/* - * (C) Copyright 2004 Tundra Semiconductor Corp. - * Author: Alex Bounine - * - * NOTE: This driver should be converted to driver model before June 2017. - * Please see doc/driver-model/i2c-howto.txt for instructions. - */ - -#include <config.h> -#include <common.h> - -#include <tsi108.h> - -#if defined(CONFIG_CMD_I2C) - -#define I2C_DELAY 100000 -#undef DEBUG_I2C - -#ifdef DEBUG_I2C -#define DPRINT(x) printf (x) -#else -#define DPRINT(x) -#endif - -/* All functions assume that Tsi108 I2C block is the only master on the bus */ -/* I2C read helper function */ - -void i2c_init(int speed, int slaveaddr) -{ - /* - * The TSI108 has a fixed I2C clock rate and doesn't support slave - * operation. This function only exists as a stub to fit into the - * U-Boot I2C API. - */ -} - -static int i2c_read_byte ( - uint i2c_chan, /* I2C channel number: 0 - main, 1 - SDC SPD */ - uchar chip_addr,/* I2C device address on the bus */ - uint byte_addr, /* Byte address within I2C device */ - uchar * buffer /* pointer to data buffer */ - ) -{ - u32 temp; - u32 to_count = I2C_DELAY; - u32 op_status = TSI108_I2C_TIMEOUT_ERR; - u32 chan_offset = TSI108_I2C_OFFSET; - - DPRINT (("I2C read_byte() %d 0x%02x 0x%02x\n", - i2c_chan, chip_addr, byte_addr)); - - if (0 != i2c_chan) - chan_offset = TSI108_I2C_SDRAM_OFFSET; - - /* Check if I2C operation is in progress */ - temp = *(u32 *) (CONFIG_SYS_TSI108_CSR_BASE + chan_offset + I2C_CNTRL2); - - if (0 == (temp & (I2C_CNTRL2_RD_STATUS | I2C_CNTRL2_WR_STATUS | - I2C_CNTRL2_START))) { - /* Set device address and operation (read = 0) */ - temp = (byte_addr << 16) | ((chip_addr & 0x07) << 8) | - ((chip_addr >> 3) & 0x0F); - *(u32 *) (CONFIG_SYS_TSI108_CSR_BASE + chan_offset + I2C_CNTRL1) = - temp; - - /* Issue the read command - * (at this moment all other parameters are 0 - * (size = 1 byte, lane = 0) - */ - - *(u32 *) (CONFIG_SYS_TSI108_CSR_BASE + chan_offset + I2C_CNTRL2) = - (I2C_CNTRL2_START); - - /* Wait until operation completed */ - do { - /* Read I2C operation status */ - temp = *(u32 *) (CONFIG_SYS_TSI108_CSR_BASE + chan_offset + I2C_CNTRL2); - - if (0 == (temp & (I2C_CNTRL2_RD_STATUS | I2C_CNTRL2_START))) { - if (0 == (temp & - (I2C_CNTRL2_I2C_CFGERR | - I2C_CNTRL2_I2C_TO_ERR)) - ) { - op_status = TSI108_I2C_SUCCESS; - - temp = *(u32 *) (CONFIG_SYS_TSI108_CSR_BASE + - chan_offset + - I2C_RD_DATA); - - *buffer = (u8) (temp & 0xFF); - } else { - /* report HW error */ - op_status = TSI108_I2C_IF_ERROR; - - DPRINT (("I2C HW error reported: 0x%02x\n", temp)); - } - - break; - } - } while (to_count--); - } else { - op_status = TSI108_I2C_IF_BUSY; - - DPRINT (("I2C Transaction start failed: 0x%02x\n", temp)); - } - - DPRINT (("I2C read_byte() status: 0x%02x\n", op_status)); - return op_status; -} - -/* - * I2C Read interface as defined in "include/i2c.h" : - * chip_addr: I2C chip address, range 0..127 - * (to read from SPD channel EEPROM use (0xD0 ... 0xD7) - * NOTE: The bit 7 in the chip_addr serves as a channel select. - * This hack is for enabling "i2c sdram" command on Tsi108 boards - * without changes to common code. Used for I2C reads only. - * byte_addr: Memory or register address within the chip - * alen: Number of bytes to use for addr (typically 1, 2 for larger - * memories, 0 for register type devices with only one - * register) - * buffer: Pointer to destination buffer for data to be read - * len: How many bytes to read - * - * Returns: 0 on success, not 0 on failure - */ - -int i2c_read (uchar chip_addr, uint byte_addr, int alen, - uchar * buffer, int len) -{ - u32 op_status = TSI108_I2C_PARAM_ERR; - u32 i2c_if = 0; - - /* Hack to support second (SPD) I2C controller (SPD EEPROM read only).*/ - if (0xD0 == (chip_addr & ~0x07)) { - i2c_if = 1; - chip_addr &= 0x7F; - } - /* Check for valid I2C address */ - if (chip_addr <= 0x7F && (byte_addr + len) <= (0x01 << (alen * 8))) { - while (len--) { - op_status = i2c_read_byte(i2c_if, chip_addr, byte_addr++, buffer++); - - if (TSI108_I2C_SUCCESS != op_status) { - DPRINT (("I2C read_byte() failed: 0x%02x (%d left)\n", op_status, len)); - - break; - } - } - } - - DPRINT (("I2C read() status: 0x%02x\n", op_status)); - return op_status; -} - -/* I2C write helper function */ - -static int i2c_write_byte (uchar chip_addr,/* I2C device address on the bus */ - uint byte_addr, /* Byte address within I2C device */ - uchar * buffer /* pointer to data buffer */ - ) -{ - u32 temp; - u32 to_count = I2C_DELAY; - u32 op_status = TSI108_I2C_TIMEOUT_ERR; - - /* Check if I2C operation is in progress */ - temp = *(u32 *) (CONFIG_SYS_TSI108_CSR_BASE + TSI108_I2C_OFFSET + I2C_CNTRL2); - - if (0 == (temp & (I2C_CNTRL2_RD_STATUS | I2C_CNTRL2_WR_STATUS | I2C_CNTRL2_START))) { - /* Place data into the I2C Tx Register */ - *(u32 *) (CONFIG_SYS_TSI108_CSR_BASE + TSI108_I2C_OFFSET + - I2C_TX_DATA) = (u32) * buffer; - - /* Set device address and operation */ - temp = - I2C_CNTRL1_I2CWRITE | (byte_addr << 16) | - ((chip_addr & 0x07) << 8) | ((chip_addr >> 3) & 0x0F); - *(u32 *) (CONFIG_SYS_TSI108_CSR_BASE + TSI108_I2C_OFFSET + - I2C_CNTRL1) = temp; - - /* Issue the write command (at this moment all other parameters - * are 0 (size = 1 byte, lane = 0) - */ - - *(u32 *) (CONFIG_SYS_TSI108_CSR_BASE + TSI108_I2C_OFFSET + - I2C_CNTRL2) = (I2C_CNTRL2_START); - - op_status = TSI108_I2C_TIMEOUT_ERR; - - /* Wait until operation completed */ - do { - /* Read I2C operation status */ - temp = *(u32 *) (CONFIG_SYS_TSI108_CSR_BASE + TSI108_I2C_OFFSET + I2C_CNTRL2); - - if (0 == (temp & (I2C_CNTRL2_WR_STATUS | I2C_CNTRL2_START))) { - if (0 == (temp & - (I2C_CNTRL2_I2C_CFGERR | - I2C_CNTRL2_I2C_TO_ERR))) { - op_status = TSI108_I2C_SUCCESS; - } else { - /* report detected HW error */ - op_status = TSI108_I2C_IF_ERROR; - - DPRINT (("I2C HW error reported: 0x%02x\n", temp)); - } - - break; - } - - } while (to_count--); - } else { - op_status = TSI108_I2C_IF_BUSY; - - DPRINT (("I2C Transaction start failed: 0x%02x\n", temp)); - } - - return op_status; -} - -/* - * I2C Write interface as defined in "include/i2c.h" : - * chip_addr: I2C chip address, range 0..127 - * byte_addr: Memory or register address within the chip - * alen: Number of bytes to use for addr (typically 1, 2 for larger - * memories, 0 for register type devices with only one - * register) - * buffer: Pointer to data to be written - * len: How many bytes to write - * - * Returns: 0 on success, not 0 on failure - */ - -int i2c_write (uchar chip_addr, uint byte_addr, int alen, uchar * buffer, - int len) -{ - u32 op_status = TSI108_I2C_PARAM_ERR; - - /* Check for valid I2C address */ - if (chip_addr <= 0x7F && (byte_addr + len) <= (0x01 << (alen * 8))) { - while (len--) { - op_status = - i2c_write_byte (chip_addr, byte_addr++, buffer++); - - if (TSI108_I2C_SUCCESS != op_status) { - DPRINT (("I2C write_byte() failed: 0x%02x (%d left)\n", op_status, len)); - - break; - } - } - } - - return op_status; -} - -/* - * I2C interface function as defined in "include/i2c.h". - * Probe the given I2C chip address by reading single byte from offset 0. - * Returns 0 if a chip responded, not 0 on failure. - */ - -int i2c_probe (uchar chip) -{ - u32 tmp; - - /* - * Try to read the first location of the chip. - * The Tsi108 HW doesn't support sending just the chip address - * and checkong for an <ACK> back. - */ - return i2c_read (chip, 0, 1, (uchar *)&tmp, 1); -} - -#endif |