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authorVipin KUMAR <vipin.kumar@st.com>2012-02-26 23:13:29 +0000
committerHeiko Schocher <hs@denx.de>2012-04-24 09:56:37 +0200
commit031ed2fa748ccfc746bd0e0073f8690c84a0d7b6 (patch)
tree405f6b6f5fd5f7adb2b6e34f13d575b23b2a3443 /arch/arm
parent2d344a2ab27d8704efd09088ee00be194b3556eb (diff)
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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>
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/include/asm/arch-spear/spr_i2c.h146
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 7521ebc..0000000
--- 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_ */