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Diffstat (limited to 'drivers/i2c/mxc_i2c.c')
-rw-r--r--drivers/i2c/mxc_i2c.c207
1 files changed, 0 insertions, 207 deletions
diff --git a/drivers/i2c/mxc_i2c.c b/drivers/i2c/mxc_i2c.c
deleted file mode 100644
index 3c2a9cf..0000000
--- a/drivers/i2c/mxc_i2c.c
+++ /dev/null
@@ -1,207 +0,0 @@
-/*
- * i2c driver for Freescale mx31
- *
- * (c) 2007 Pengutronix, Sascha Hauer <s.hauer@pengutronix.de>
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- */
-
-#include <common.h>
-
-#if defined(CONFIG_HARD_I2C) && defined(CONFIG_I2C_MXC)
-
-#include <asm/arch/mx31.h>
-#include <asm/arch/mx31-regs.h>
-
-#define IADR 0x00
-#define IFDR 0x04
-#define I2CR 0x08
-#define I2SR 0x0c
-#define I2DR 0x10
-
-#define I2CR_IEN (1 << 7)
-#define I2CR_IIEN (1 << 6)
-#define I2CR_MSTA (1 << 5)
-#define I2CR_MTX (1 << 4)
-#define I2CR_TX_NO_AK (1 << 3)
-#define I2CR_RSTA (1 << 2)
-
-#define I2SR_ICF (1 << 7)
-#define I2SR_IBB (1 << 5)
-#define I2SR_IIF (1 << 1)
-#define I2SR_RX_NO_AK (1 << 0)
-
-#ifdef CFG_I2C_MX31_PORT1
-#define I2C_BASE 0x43f80000
-#elif defined(CFG_I2C_MX31_PORT2)
-#define I2C_BASE 0x43f98000
-#elif defined(CFG_I2C_MX31_PORT3)
-#define I2C_BASE 0x43f84000
-#else
-#error "define CFG_I2C_MX31_PORTx to use the mx31 I2C driver"
-#endif
-
-#ifdef DEBUG
-#define DPRINTF(args...) printf(args)
-#else
-#define DPRINTF(args...)
-#endif
-
-static u16 div[] = { 30, 32, 36, 42, 48, 52, 60, 72, 80, 88, 104, 128, 144,
- 160, 192, 240, 288, 320, 384, 480, 576, 640, 768, 960,
- 1152, 1280, 1536, 1920, 2304, 2560, 3072, 3840};
-
-void i2c_init(int speed, int unused)
-{
- int freq = mx31_get_ipg_clk();
- int i;
-
- for (i = 0; i < 0x1f; i++)
- if (freq / div[i] <= speed)
- break;
-
- DPRINTF("%s: speed: %d\n", __FUNCTION__, speed);
-
- __REG16(I2C_BASE + I2CR) = 0; /* Reset module */
- __REG16(I2C_BASE + IFDR) = i;
- __REG16(I2C_BASE + I2CR) = I2CR_IEN;
- __REG16(I2C_BASE + I2SR) = 0;
-}
-
-static int wait_busy(void)
-{
- int timeout = 10000;
-
- while (!(__REG16(I2C_BASE + I2SR) & I2SR_IIF) && --timeout)
- udelay(1);
- __REG16(I2C_BASE + I2SR) = 0; /* clear interrupt */
-
- return timeout;
-}
-
-static int tx_byte(u8 byte)
-{
- __REG16(I2C_BASE + I2DR) = byte;
-
- if (!wait_busy() || __REG16(I2C_BASE + I2SR) & I2SR_RX_NO_AK)
- return -1;
- return 0;
-}
-
-static int rx_byte(void)
-{
- if (!wait_busy())
- return -1;
-
- return __REG16(I2C_BASE + I2DR);
-}
-
-int i2c_probe(uchar chip)
-{
- int ret;
-
- __REG16(I2C_BASE + I2CR) = 0; /* Reset module */
- __REG16(I2C_BASE + I2CR) = I2CR_IEN;
-
- __REG16(I2C_BASE + I2CR) = I2CR_IEN | I2CR_MSTA | I2CR_MTX;
- ret = tx_byte(chip << 1);
- __REG16(I2C_BASE + I2CR) = I2CR_IEN | I2CR_MTX;
-
- return ret;
-}
-
-static int i2c_addr(uchar chip, uint addr, int alen)
-{
- __REG16(I2C_BASE + I2SR) = 0; /* clear interrupt */
- __REG16(I2C_BASE + I2CR) = I2CR_IEN | I2CR_MSTA | I2CR_MTX;
-
- if (tx_byte(chip << 1))
- return -1;
-
- while (alen--)
- if (tx_byte((addr >> (alen * 8)) & 0xff))
- return -1;
- return 0;
-}
-
-int i2c_read(uchar chip, uint addr, int alen, uchar *buf, int len)
-{
- int timeout = 10000;
- int ret;
-
- DPRINTF("%s chip: 0x%02x addr: 0x%04x alen: %d len: +%d\n", \
- __FUNCTION__, chip, addr, alen, len);
-
- if (i2c_addr(chip, addr, alen)) {
- printf("i2c_addr failed\n");
- return -1;
- }
-
- __REG16(I2C_BASE + I2CR) = I2CR_IEN | I2CR_MSTA | \
- I2CR_MTX | I2CR_RSTA;
-
- if (tx_byte(chip << 1 | 1))
- return -1;
-
- __REG16(I2C_BASE + I2CR) = I2CR_IEN | I2CR_MSTA | ((len == 1) \
- ? I2CR_TX_NO_AK : 0);
-
- ret = __REG16(I2C_BASE + I2DR);
-
- while (len--) {
- if ((ret = rx_byte()) < 0)
- return -1;
- *buf++ = ret;
- if (len <= 1)
- __REG16(I2C_BASE + I2CR) = I2CR_IEN | \
- I2CR_MSTA | I2CR_TX_NO_AK;
- }
-
- wait_busy();
-
- __REG16(I2C_BASE + I2CR) = I2CR_IEN;
-
- while (__REG16(I2C_BASE + I2SR) & I2SR_IBB && --timeout)
- udelay(1);
-
- return 0;
-}
-
-int i2c_write(uchar chip, uint addr, int alen, uchar *buf, int len)
-{
- int timeout = 10000;
- DPRINTF("%s chip: 0x%02x addr: 0x%04x alen: %d len: %d\n", \
- __FUNCTION__, chip, addr, alen, len);
-
- if (i2c_addr(chip, addr, alen))
- return -1;
-
- while (len--)
- if (tx_byte(*buf++))
- return -1;
-
- __REG16(I2C_BASE + I2CR) = I2CR_IEN;
-
- while (__REG16(I2C_BASE + I2SR) & I2SR_IBB && --timeout)
- udelay(1);
-
- return 0;
-}
-
-#endif /* CONFIG_HARD_I2C */