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Diffstat (limited to 'qemu/roms/u-boot/drivers/i2c/mv_i2c.c')
-rw-r--r--qemu/roms/u-boot/drivers/i2c/mv_i2c.c471
1 files changed, 0 insertions, 471 deletions
diff --git a/qemu/roms/u-boot/drivers/i2c/mv_i2c.c b/qemu/roms/u-boot/drivers/i2c/mv_i2c.c
deleted file mode 100644
index dac346334..000000000
--- a/qemu/roms/u-boot/drivers/i2c/mv_i2c.c
+++ /dev/null
@@ -1,471 +0,0 @@
-/*
- * (C) Copyright 2000
- * Paolo Scaffardi, AIRVENT SAM s.p.a - RIMINI(ITALY), arsenio@tin.it
- *
- * (C) Copyright 2000 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
- * Marius Groeger <mgroeger@sysgo.de>
- *
- * (C) Copyright 2003 Pengutronix e.K.
- * Robert Schwebel <r.schwebel@pengutronix.de>
- *
- * (C) Copyright 2011 Marvell Inc.
- * Lei Wen <leiwen@marvell.com>
- *
- * SPDX-License-Identifier: GPL-2.0+
- *
- * Back ported to the 8xx platform (from the 8260 platform) by
- * Murray.Jensen@cmst.csiro.au, 27-Jan-01.
- */
-
-#include <common.h>
-#include <asm/io.h>
-
-#ifdef CONFIG_HARD_I2C
-#include <i2c.h>
-#include "mv_i2c.h"
-
-#ifdef DEBUG_I2C
-#define PRINTD(x) printf x
-#else
-#define PRINTD(x)
-#endif
-
-/* All transfers are described by this data structure */
-struct i2c_msg {
- u8 condition;
- u8 acknack;
- u8 direction;
- u8 data;
-};
-
-struct mv_i2c {
- u32 ibmr;
- u32 pad0;
- u32 idbr;
- u32 pad1;
- u32 icr;
- u32 pad2;
- u32 isr;
- u32 pad3;
- u32 isar;
-};
-
-static struct mv_i2c *base;
-static void i2c_board_init(struct mv_i2c *base)
-{
-#ifdef CONFIG_SYS_I2C_INIT_BOARD
- u32 icr;
- /*
- * 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.
- *
- * disable I2C controller first, otherwhise it thinks we want to
- * talk to the slave port...
- */
- icr = readl(&base->icr);
- writel(readl(&base->icr) & ~(ICR_SCLE | ICR_IUE), &base->icr);
-
- i2c_init_board();
-
- writel(icr, &base->icr);
-#endif
-}
-
-#ifdef CONFIG_I2C_MULTI_BUS
-static u32 i2c_regs[CONFIG_MV_I2C_NUM] = CONFIG_MV_I2C_REG;
-static unsigned int bus_initialized[CONFIG_MV_I2C_NUM];
-static unsigned int current_bus;
-
-int i2c_set_bus_num(unsigned int bus)
-{
- if ((bus < 0) || (bus >= CONFIG_MV_I2C_NUM)) {
- printf("Bad bus: %d\n", bus);
- return -1;
- }
-
- base = (struct mv_i2c *)i2c_regs[bus];
- current_bus = bus;
-
- if (!bus_initialized[current_bus]) {
- i2c_board_init(base);
- bus_initialized[current_bus] = 1;
- }
-
- return 0;
-}
-
-unsigned int i2c_get_bus_num(void)
-{
- return current_bus;
-}
-#endif
-
-/*
- * i2c_reset: - reset the host controller
- *
- */
-static void i2c_reset(void)
-{
- writel(readl(&base->icr) & ~ICR_IUE, &base->icr); /* disable unit */
- writel(readl(&base->icr) | ICR_UR, &base->icr); /* reset the unit */
- udelay(100);
- writel(readl(&base->icr) & ~ICR_IUE, &base->icr); /* disable unit */
-
- i2c_clk_enable();
-
- writel(CONFIG_SYS_I2C_SLAVE, &base->isar); /* set our slave address */
- writel(I2C_ICR_INIT, &base->icr); /* set control reg values */
- writel(I2C_ISR_INIT, &base->isr); /* set clear interrupt bits */
- writel(readl(&base->icr) | ICR_IUE, &base->icr); /* enable unit */
- udelay(100);
-}
-
-/*
- * i2c_isr_set_cleared: - wait until certain bits of the I2C status register
- * are set and cleared
- *
- * @return: 1 in case of success, 0 means timeout (no match within 10 ms).
- */
-static int i2c_isr_set_cleared(unsigned long set_mask,
- unsigned long cleared_mask)
-{
- int timeout = 1000, isr;
-
- do {
- isr = readl(&base->isr);
- udelay(10);
- if (timeout-- < 0)
- return 0;
- } while (((isr & set_mask) != set_mask)
- || ((isr & cleared_mask) != 0));
-
- return 1;
-}
-
-/*
- * i2c_transfer: - Transfer one byte over the i2c bus
- *
- * This function can tranfer a byte over the i2c bus in both directions.
- * It is used by the public API functions.
- *
- * @return: 0: transfer successful
- * -1: message is empty
- * -2: transmit timeout
- * -3: ACK missing
- * -4: receive timeout
- * -5: illegal parameters
- * -6: bus is busy and couldn't be aquired
- */
-int i2c_transfer(struct i2c_msg *msg)
-{
- int ret;
-
- if (!msg)
- goto transfer_error_msg_empty;
-
- switch (msg->direction) {
- case I2C_WRITE:
- /* check if bus is not busy */
- if (!i2c_isr_set_cleared(0, ISR_IBB))
- goto transfer_error_bus_busy;
-
- /* start transmission */
- writel(readl(&base->icr) & ~ICR_START, &base->icr);
- writel(readl(&base->icr) & ~ICR_STOP, &base->icr);
- writel(msg->data, &base->idbr);
- if (msg->condition == I2C_COND_START)
- writel(readl(&base->icr) | ICR_START, &base->icr);
- if (msg->condition == I2C_COND_STOP)
- writel(readl(&base->icr) | ICR_STOP, &base->icr);
- if (msg->acknack == I2C_ACKNAK_SENDNAK)
- writel(readl(&base->icr) | ICR_ACKNAK, &base->icr);
- if (msg->acknack == I2C_ACKNAK_SENDACK)
- writel(readl(&base->icr) & ~ICR_ACKNAK, &base->icr);
- writel(readl(&base->icr) & ~ICR_ALDIE, &base->icr);
- writel(readl(&base->icr) | ICR_TB, &base->icr);
-
- /* transmit register empty? */
- if (!i2c_isr_set_cleared(ISR_ITE, 0))
- goto transfer_error_transmit_timeout;
-
- /* clear 'transmit empty' state */
- writel(readl(&base->isr) | ISR_ITE, &base->isr);
-
- /* wait for ACK from slave */
- if (msg->acknack == I2C_ACKNAK_WAITACK)
- if (!i2c_isr_set_cleared(0, ISR_ACKNAK))
- goto transfer_error_ack_missing;
- break;
-
- case I2C_READ:
-
- /* check if bus is not busy */
- if (!i2c_isr_set_cleared(0, ISR_IBB))
- goto transfer_error_bus_busy;
-
- /* start receive */
- writel(readl(&base->icr) & ~ICR_START, &base->icr);
- writel(readl(&base->icr) & ~ICR_STOP, &base->icr);
- if (msg->condition == I2C_COND_START)
- writel(readl(&base->icr) | ICR_START, &base->icr);
- if (msg->condition == I2C_COND_STOP)
- writel(readl(&base->icr) | ICR_STOP, &base->icr);
- if (msg->acknack == I2C_ACKNAK_SENDNAK)
- writel(readl(&base->icr) | ICR_ACKNAK, &base->icr);
- if (msg->acknack == I2C_ACKNAK_SENDACK)
- writel(readl(&base->icr) & ~ICR_ACKNAK, &base->icr);
- writel(readl(&base->icr) & ~ICR_ALDIE, &base->icr);
- writel(readl(&base->icr) | ICR_TB, &base->icr);
-
- /* receive register full? */
- if (!i2c_isr_set_cleared(ISR_IRF, 0))
- goto transfer_error_receive_timeout;
-
- msg->data = readl(&base->idbr);
-
- /* clear 'receive empty' state */
- writel(readl(&base->isr) | ISR_IRF, &base->isr);
- break;
- default:
- goto transfer_error_illegal_param;
- }
-
- return 0;
-
-transfer_error_msg_empty:
- PRINTD(("i2c_transfer: error: 'msg' is empty\n"));
- ret = -1; goto i2c_transfer_finish;
-
-transfer_error_transmit_timeout:
- PRINTD(("i2c_transfer: error: transmit timeout\n"));
- ret = -2; goto i2c_transfer_finish;
-
-transfer_error_ack_missing:
- PRINTD(("i2c_transfer: error: ACK missing\n"));
- ret = -3; goto i2c_transfer_finish;
-
-transfer_error_receive_timeout:
- PRINTD(("i2c_transfer: error: receive timeout\n"));
- ret = -4; goto i2c_transfer_finish;
-
-transfer_error_illegal_param:
- PRINTD(("i2c_transfer: error: illegal parameters\n"));
- ret = -5; goto i2c_transfer_finish;
-
-transfer_error_bus_busy:
- PRINTD(("i2c_transfer: error: bus is busy\n"));
- ret = -6; goto i2c_transfer_finish;
-
-i2c_transfer_finish:
- PRINTD(("i2c_transfer: ISR: 0x%04x\n", readl(&base->isr)));
- i2c_reset();
- return ret;
-}
-
-/* ------------------------------------------------------------------------ */
-/* API Functions */
-/* ------------------------------------------------------------------------ */
-void i2c_init(int speed, int slaveaddr)
-{
-#ifdef CONFIG_I2C_MULTI_BUS
- current_bus = 0;
- base = (struct mv_i2c *)i2c_regs[current_bus];
-#else
- base = (struct mv_i2c *)CONFIG_MV_I2C_REG;
-#endif
-
- i2c_board_init(base);
-}
-
-/*
- * 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(uchar chip)
-{
- struct i2c_msg msg;
-
- i2c_reset();
-
- msg.condition = I2C_COND_START;
- msg.acknack = I2C_ACKNAK_WAITACK;
- msg.direction = I2C_WRITE;
- msg.data = (chip << 1) + 1;
- if (i2c_transfer(&msg))
- return -1;
-
- msg.condition = I2C_COND_STOP;
- msg.acknack = I2C_ACKNAK_SENDNAK;
- msg.direction = I2C_READ;
- msg.data = 0x00;
- if (i2c_transfer(&msg))
- return -1;
-
- return 0;
-}
-
-/*
- * 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(uchar chip, uint addr, int alen, uchar *buffer, int len)
-{
- struct i2c_msg msg;
- u8 addr_bytes[3]; /* lowest...highest byte of data address */
-
- PRINTD(("i2c_read(chip=0x%02x, addr=0x%02x, alen=0x%02x, "
- "len=0x%02x)\n", chip, addr, alen, len));
-
- i2c_reset();
-
- /* dummy chip address write */
- PRINTD(("i2c_read: dummy chip address write\n"));
- msg.condition = I2C_COND_START;
- msg.acknack = I2C_ACKNAK_WAITACK;
- msg.direction = I2C_WRITE;
- msg.data = (chip << 1);
- msg.data &= 0xFE;
- if (i2c_transfer(&msg))
- return -1;
-
- /*
- * send memory address bytes;
- * alen defines how much bytes we have to send.
- */
- /*addr &= ((1 << CONFIG_SYS_EEPROM_PAGE_WRITE_BITS)-1); */
- addr_bytes[0] = (u8)((addr >> 0) & 0x000000FF);
- addr_bytes[1] = (u8)((addr >> 8) & 0x000000FF);
- addr_bytes[2] = (u8)((addr >> 16) & 0x000000FF);
-
- while (--alen >= 0) {
- PRINTD(("i2c_read: send memory word address byte %1d\n", alen));
- msg.condition = I2C_COND_NORMAL;
- msg.acknack = I2C_ACKNAK_WAITACK;
- msg.direction = I2C_WRITE;
- msg.data = addr_bytes[alen];
- if (i2c_transfer(&msg))
- return -1;
- }
-
- /* start read sequence */
- PRINTD(("i2c_read: start read sequence\n"));
- msg.condition = I2C_COND_START;
- msg.acknack = I2C_ACKNAK_WAITACK;
- msg.direction = I2C_WRITE;
- msg.data = (chip << 1);
- msg.data |= 0x01;
- if (i2c_transfer(&msg))
- return -1;
-
- /* read bytes; send NACK at last byte */
- while (len--) {
- if (len == 0) {
- msg.condition = I2C_COND_STOP;
- msg.acknack = I2C_ACKNAK_SENDNAK;
- } else {
- msg.condition = I2C_COND_NORMAL;
- msg.acknack = I2C_ACKNAK_SENDACK;
- }
-
- msg.direction = I2C_READ;
- msg.data = 0x00;
- if (i2c_transfer(&msg))
- return -1;
-
- *buffer = msg.data;
- PRINTD(("i2c_read: reading byte (0x%08x)=0x%02x\n",
- (unsigned int)buffer, *buffer));
- buffer++;
- }
-
- i2c_reset();
-
- 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(uchar chip, uint addr, int alen, uchar *buffer, int len)
-{
- struct i2c_msg msg;
- u8 addr_bytes[3]; /* lowest...highest byte of data address */
-
- PRINTD(("i2c_write(chip=0x%02x, addr=0x%02x, alen=0x%02x, "
- "len=0x%02x)\n", chip, addr, alen, len));
-
- i2c_reset();
-
- /* chip address write */
- PRINTD(("i2c_write: chip address write\n"));
- msg.condition = I2C_COND_START;
- msg.acknack = I2C_ACKNAK_WAITACK;
- msg.direction = I2C_WRITE;
- msg.data = (chip << 1);
- msg.data &= 0xFE;
- if (i2c_transfer(&msg))
- return -1;
-
- /*
- * send memory address bytes;
- * alen defines how much bytes we have to send.
- */
- addr_bytes[0] = (u8)((addr >> 0) & 0x000000FF);
- addr_bytes[1] = (u8)((addr >> 8) & 0x000000FF);
- addr_bytes[2] = (u8)((addr >> 16) & 0x000000FF);
-
- while (--alen >= 0) {
- PRINTD(("i2c_write: send memory word address\n"));
- msg.condition = I2C_COND_NORMAL;
- msg.acknack = I2C_ACKNAK_WAITACK;
- msg.direction = I2C_WRITE;
- msg.data = addr_bytes[alen];
- if (i2c_transfer(&msg))
- return -1;
- }
-
- /* write bytes; send NACK at last byte */
- while (len--) {
- PRINTD(("i2c_write: writing byte (0x%08x)=0x%02x\n",
- (unsigned int)buffer, *buffer));
-
- if (len == 0)
- msg.condition = I2C_COND_STOP;
- else
- msg.condition = I2C_COND_NORMAL;
-
- msg.acknack = I2C_ACKNAK_WAITACK;
- msg.direction = I2C_WRITE;
- msg.data = *(buffer++);
-
- if (i2c_transfer(&msg))
- return -1;
- }
-
- i2c_reset();
-
- return 0;
-}
-#endif /* CONFIG_HARD_I2C */