i2c: Add support for designware i2c controller

Earlier, a driver exists in the u-boot source for designware i2c interface. That
driver was specific to spear platforms. This patch implements the i2c controller
as a generic driver which can be used by multiple platforms

The driver files are now renamed to designware_i2c.c and designware_i2c.h and
these are moved into drivers/i2c folder for reusability by other
platforms

Signed-off-by: Vipin Kumar <vipin.kumar@st.com>
Signed-off-by: Amit Virdi <amit.virdi@st.com>

1 files changed, 0 insertions, 146 deletions

diff --git a/arch/arm/include/asm/arch-spear/spr_i2c.h b/arch/arm/include/asm/arch-spear/spr_i2c.h
deleted file mode 100644
index 7521ebc6cf..0000000000
--- a/arch/arm/include/asm/arch-spear/spr_i2c.h
+++ /dev/null
@@ -1,146 +0,0 @@
-/*
- * (C) Copyright 2009
- * Vipin Kumar, ST Micoelectronics, vipin.kumar@st.com.
- *
- * 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
- */
-
-#ifndef __SPR_I2C_H_
-#define __SPR_I2C_H_
-
-struct i2c_regs {
-	u32 ic_con;
-	u32 ic_tar;
-	u32 ic_sar;
-	u32 ic_hs_maddr;
-	u32 ic_cmd_data;
-	u32 ic_ss_scl_hcnt;
-	u32 ic_ss_scl_lcnt;
-	u32 ic_fs_scl_hcnt;
-	u32 ic_fs_scl_lcnt;
-	u32 ic_hs_scl_hcnt;
-	u32 ic_hs_scl_lcnt;
-	u32 ic_intr_stat;
-	u32 ic_intr_mask;
-	u32 ic_raw_intr_stat;
-	u32 ic_rx_tl;
-	u32 ic_tx_tl;
-	u32 ic_clr_intr;
-	u32 ic_clr_rx_under;
-	u32 ic_clr_rx_over;
-	u32 ic_clr_tx_over;
-	u32 ic_clr_rd_req;
-	u32 ic_clr_tx_abrt;
-	u32 ic_clr_rx_done;
-	u32 ic_clr_activity;
-	u32 ic_clr_stop_det;
-	u32 ic_clr_start_det;
-	u32 ic_clr_gen_call;
-	u32 ic_enable;
-	u32 ic_status;
-	u32 ic_txflr;
-	u32 ix_rxflr;
-	u32 reserved_1;
-	u32 ic_tx_abrt_source;
-};
-
-#define IC_CLK			166
-#define NANO_TO_MICRO		1000
-
-/* High and low times in different speed modes (in ns) */
-#define MIN_SS_SCL_HIGHTIME	4000
-#define MIN_SS_SCL_LOWTIME	5000
-#define MIN_FS_SCL_HIGHTIME	800
-#define MIN_FS_SCL_LOWTIME	1700
-#define MIN_HS_SCL_HIGHTIME	60
-#define MIN_HS_SCL_LOWTIME	160
-
-/* Worst case timeout for 1 byte is kept as 2ms */
-#define I2C_BYTE_TO		(CONFIG_SYS_HZ/500)
-#define I2C_STOPDET_TO		(CONFIG_SYS_HZ/500)
-#define I2C_BYTE_TO_BB		(I2C_BYTE_TO * 16)
-
-/* i2c control register definitions */
-#define IC_CON_SD		0x0040
-#define IC_CON_RE		0x0020
-#define IC_CON_10BITADDRMASTER	0x0010
-#define IC_CON_10BITADDR_SLAVE	0x0008
-#define IC_CON_SPD_MSK		0x0006
-#define IC_CON_SPD_SS		0x0002
-#define IC_CON_SPD_FS		0x0004
-#define IC_CON_SPD_HS		0x0006
-#define IC_CON_MM		0x0001
-
-/* i2c target address register definitions */
-#define TAR_ADDR		0x0050
-
-/* i2c slave address register definitions */
-#define IC_SLAVE_ADDR		0x0002
-
-/* i2c data buffer and command register definitions */
-#define IC_CMD			0x0100
-
-/* i2c interrupt status register definitions */
-#define IC_GEN_CALL		0x0800
-#define IC_START_DET		0x0400
-#define IC_STOP_DET		0x0200
-#define IC_ACTIVITY		0x0100
-#define IC_RX_DONE		0x0080
-#define IC_TX_ABRT		0x0040
-#define IC_RD_REQ		0x0020
-#define IC_TX_EMPTY		0x0010
-#define IC_TX_OVER		0x0008
-#define IC_RX_FULL		0x0004
-#define IC_RX_OVER 		0x0002
-#define IC_RX_UNDER		0x0001
-
-/* fifo threshold register definitions */
-#define IC_TL0			0x00
-#define IC_TL1			0x01
-#define IC_TL2			0x02
-#define IC_TL3			0x03
-#define IC_TL4			0x04
-#define IC_TL5			0x05
-#define IC_TL6			0x06
-#define IC_TL7			0x07
-#define IC_RX_TL		IC_TL0
-#define IC_TX_TL		IC_TL0
-
-/* i2c enable register definitions */
-#define IC_ENABLE_0B		0x0001
-
-/* i2c status register  definitions */
-#define IC_STATUS_SA		0x0040
-#define IC_STATUS_MA		0x0020
-#define IC_STATUS_RFF		0x0010
-#define IC_STATUS_RFNE		0x0008
-#define IC_STATUS_TFE		0x0004
-#define IC_STATUS_TFNF		0x0002
-#define IC_STATUS_ACT		0x0001
-
-/* Speed Selection */
-#define IC_SPEED_MODE_STANDARD	1
-#define IC_SPEED_MODE_FAST	2
-#define IC_SPEED_MODE_MAX	3
-
-#define I2C_MAX_SPEED		3400000
-#define I2C_FAST_SPEED		400000
-#define I2C_STANDARD_SPEED	100000
-
-#endif /* __SPR_I2C_H_ */