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https://github.com/brain-hackers/u-boot-brain
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![Simon Glass](/assets/img/avatar_default.png)
Maintainers need to be notified more directly of the need to convert these drivers. Add a note to the top each affected file. Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Heiko Schocher <hs@denx.de>
261 lines
5.9 KiB
C
261 lines
5.9 KiB
C
/*
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* (C) Copyright 2013
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* Dirk Eibach, Guntermann & Drunck GmbH, eibach@gdsys.de
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*
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* SPDX-License-Identifier: GPL-2.0+
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*
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* NOTE: This driver should be converted to driver model before June 2017.
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* Please see doc/driver-model/i2c-howto.txt for instructions.
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*/
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#include <common.h>
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#include <i2c.h>
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#include <gdsys_fpga.h>
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DECLARE_GLOBAL_DATA_PTR;
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#ifdef CONFIG_SYS_I2C_IHS_DUAL
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#define I2C_SET_REG(fld, val) \
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do { \
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if (I2C_ADAP_HWNR & 0x10) \
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FPGA_SET_REG(I2C_ADAP_HWNR & 0xf, i2c1.fld, val); \
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else \
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FPGA_SET_REG(I2C_ADAP_HWNR, i2c0.fld, val); \
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} while (0)
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#else
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#define I2C_SET_REG(fld, val) \
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FPGA_SET_REG(I2C_ADAP_HWNR, i2c0.fld, val)
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#endif
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#ifdef CONFIG_SYS_I2C_IHS_DUAL
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#define I2C_GET_REG(fld, val) \
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do { \
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if (I2C_ADAP_HWNR & 0x10) \
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FPGA_GET_REG(I2C_ADAP_HWNR & 0xf, i2c1.fld, val); \
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else \
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FPGA_GET_REG(I2C_ADAP_HWNR, i2c0.fld, val); \
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} while (0)
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#else
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#define I2C_GET_REG(fld, val) \
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FPGA_GET_REG(I2C_ADAP_HWNR, i2c0.fld, val)
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#endif
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enum {
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I2CINT_ERROR_EV = 1 << 13,
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I2CINT_TRANSMIT_EV = 1 << 14,
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I2CINT_RECEIVE_EV = 1 << 15,
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};
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enum {
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I2CMB_WRITE = 1 << 10,
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I2CMB_2BYTE = 1 << 11,
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I2CMB_HOLD_BUS = 1 << 13,
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I2CMB_NATIVE = 2 << 14,
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};
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static int wait_for_int(bool read)
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{
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u16 val;
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unsigned int ctr = 0;
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I2C_GET_REG(interrupt_status, &val);
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while (!(val & (I2CINT_ERROR_EV
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| (read ? I2CINT_RECEIVE_EV : I2CINT_TRANSMIT_EV)))) {
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udelay(10);
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if (ctr++ > 5000) {
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return 1;
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}
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I2C_GET_REG(interrupt_status, &val);
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}
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return (val & I2CINT_ERROR_EV) ? 1 : 0;
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}
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static int ihs_i2c_transfer(uchar chip, uchar *buffer, int len, bool read,
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bool is_last)
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{
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u16 val;
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I2C_SET_REG(interrupt_status, I2CINT_ERROR_EV
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| I2CINT_RECEIVE_EV | I2CINT_TRANSMIT_EV);
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I2C_GET_REG(interrupt_status, &val);
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if (!read && len) {
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val = buffer[0];
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if (len > 1)
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val |= buffer[1] << 8;
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I2C_SET_REG(write_mailbox_ext, val);
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}
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I2C_SET_REG(write_mailbox,
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I2CMB_NATIVE
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| (read ? 0 : I2CMB_WRITE)
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| (chip << 1)
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| ((len > 1) ? I2CMB_2BYTE : 0)
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| (is_last ? 0 : I2CMB_HOLD_BUS));
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if (wait_for_int(read))
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return 1;
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if (read) {
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I2C_GET_REG(read_mailbox_ext, &val);
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buffer[0] = val & 0xff;
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if (len > 1)
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buffer[1] = val >> 8;
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}
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return 0;
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}
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static int ihs_i2c_address(uchar chip, uint addr, int alen, bool hold_bus)
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{
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int shift = (alen-1) * 8;
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while (alen) {
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int transfer = min(alen, 2);
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uchar buf[2];
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bool is_last = alen <= transfer;
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buf[0] = addr >> shift;
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if (alen > 1)
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buf[1] = addr >> (shift - 8);
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if (ihs_i2c_transfer(chip, buf, transfer, false,
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hold_bus ? false : is_last))
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return 1;
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shift -= 16;
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alen -= transfer;
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}
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return 0;
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}
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static int ihs_i2c_access(struct i2c_adapter *adap, uchar chip, uint addr,
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int alen, uchar *buffer, int len, bool read)
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{
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if (len <= 0)
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return 1;
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if (ihs_i2c_address(chip, addr, alen, len))
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return 1;
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while (len) {
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int transfer = min(len, 2);
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if (ihs_i2c_transfer(chip, buffer, transfer, read,
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len <= transfer))
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return 1;
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buffer += transfer;
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addr += transfer;
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len -= transfer;
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}
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return 0;
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}
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static void ihs_i2c_init(struct i2c_adapter *adap, int speed, int slaveaddr)
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{
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#ifdef CONFIG_SYS_I2C_INIT_BOARD
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/*
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* Call board specific i2c bus reset routine before accessing the
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* environment, which might be in a chip on that bus. For details
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* about this problem see doc/I2C_Edge_Conditions.
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*/
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i2c_init_board();
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#endif
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}
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static int ihs_i2c_probe(struct i2c_adapter *adap, uchar chip)
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{
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uchar buffer[2];
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if (ihs_i2c_transfer(chip, buffer, 0, true, true))
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return 1;
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return 0;
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}
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static int ihs_i2c_read(struct i2c_adapter *adap, uchar chip, uint addr,
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int alen, uchar *buffer, int len)
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{
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return ihs_i2c_access(adap, chip, addr, alen, buffer, len, true);
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}
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static int ihs_i2c_write(struct i2c_adapter *adap, uchar chip, uint addr,
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int alen, uchar *buffer, int len)
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{
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return ihs_i2c_access(adap, chip, addr, alen, buffer, len, false);
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}
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static unsigned int ihs_i2c_set_bus_speed(struct i2c_adapter *adap,
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unsigned int speed)
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{
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if (speed != adap->speed)
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return 1;
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return speed;
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}
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/*
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* Register IHS i2c adapters
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*/
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#ifdef CONFIG_SYS_I2C_IHS_CH0
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U_BOOT_I2C_ADAP_COMPLETE(ihs0, ihs_i2c_init, ihs_i2c_probe,
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ihs_i2c_read, ihs_i2c_write,
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ihs_i2c_set_bus_speed,
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CONFIG_SYS_I2C_IHS_SPEED_0,
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CONFIG_SYS_I2C_IHS_SLAVE_0, 0)
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#ifdef CONFIG_SYS_I2C_IHS_DUAL
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U_BOOT_I2C_ADAP_COMPLETE(ihs0_1, ihs_i2c_init, ihs_i2c_probe,
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ihs_i2c_read, ihs_i2c_write,
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ihs_i2c_set_bus_speed,
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CONFIG_SYS_I2C_IHS_SPEED_0_1,
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CONFIG_SYS_I2C_IHS_SLAVE_0_1, 16)
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#endif
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#endif
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#ifdef CONFIG_SYS_I2C_IHS_CH1
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U_BOOT_I2C_ADAP_COMPLETE(ihs1, ihs_i2c_init, ihs_i2c_probe,
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ihs_i2c_read, ihs_i2c_write,
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ihs_i2c_set_bus_speed,
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CONFIG_SYS_I2C_IHS_SPEED_1,
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CONFIG_SYS_I2C_IHS_SLAVE_1, 1)
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#ifdef CONFIG_SYS_I2C_IHS_DUAL
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U_BOOT_I2C_ADAP_COMPLETE(ihs1_1, ihs_i2c_init, ihs_i2c_probe,
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ihs_i2c_read, ihs_i2c_write,
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ihs_i2c_set_bus_speed,
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CONFIG_SYS_I2C_IHS_SPEED_1_1,
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CONFIG_SYS_I2C_IHS_SLAVE_1_1, 17)
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#endif
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#endif
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#ifdef CONFIG_SYS_I2C_IHS_CH2
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U_BOOT_I2C_ADAP_COMPLETE(ihs2, ihs_i2c_init, ihs_i2c_probe,
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ihs_i2c_read, ihs_i2c_write,
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ihs_i2c_set_bus_speed,
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CONFIG_SYS_I2C_IHS_SPEED_2,
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CONFIG_SYS_I2C_IHS_SLAVE_2, 2)
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#ifdef CONFIG_SYS_I2C_IHS_DUAL
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U_BOOT_I2C_ADAP_COMPLETE(ihs2_1, ihs_i2c_init, ihs_i2c_probe,
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ihs_i2c_read, ihs_i2c_write,
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ihs_i2c_set_bus_speed,
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CONFIG_SYS_I2C_IHS_SPEED_2_1,
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CONFIG_SYS_I2C_IHS_SLAVE_2_1, 18)
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#endif
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#endif
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#ifdef CONFIG_SYS_I2C_IHS_CH3
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U_BOOT_I2C_ADAP_COMPLETE(ihs3, ihs_i2c_init, ihs_i2c_probe,
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ihs_i2c_read, ihs_i2c_write,
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ihs_i2c_set_bus_speed,
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CONFIG_SYS_I2C_IHS_SPEED_3,
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CONFIG_SYS_I2C_IHS_SLAVE_3, 3)
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#ifdef CONFIG_SYS_I2C_IHS_DUAL
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U_BOOT_I2C_ADAP_COMPLETE(ihs3_1, ihs_i2c_init, ihs_i2c_probe,
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ihs_i2c_read, ihs_i2c_write,
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ihs_i2c_set_bus_speed,
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CONFIG_SYS_I2C_IHS_SPEED_3_1,
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CONFIG_SYS_I2C_IHS_SLAVE_3_1, 19)
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#endif
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#endif
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