mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-12 20:56:46 +07:00
a6a36008d7
This patch removes the re-coded i2c_write function from the ohci-nxp driver in favour of using just smbus functions. Signed-off-by: Roland Stigge <stigge@antcom.de> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
529 lines
14 KiB
C
529 lines
14 KiB
C
/*
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* driver for NXP USB Host devices
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*
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* Currently supported OHCI host devices:
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* - Philips PNX4008
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* - NXP LPC32xx
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*
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* Authors: Dmitry Chigirev <source@mvista.com>
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* Vitaly Wool <vitalywool@gmail.com>
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*
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* register initialization is based on code examples provided by Philips
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* Copyright (c) 2005 Koninklijke Philips Electronics N.V.
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*
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* NOTE: This driver does not have suspend/resume functionality
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* This driver is intended for engineering development purposes only
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*
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* 2005-2006 (c) MontaVista Software, Inc. This file is licensed under
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* the terms of the GNU General Public License version 2. This program
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* is licensed "as is" without any warranty of any kind, whether express
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* or implied.
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*/
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#include <linux/clk.h>
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#include <linux/platform_device.h>
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#include <linux/i2c.h>
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#include <mach/hardware.h>
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#include <asm/mach-types.h>
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#include <asm/io.h>
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#include <mach/platform.h>
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#include <mach/irqs.h>
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#include <asm/gpio.h>
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#define USB_CONFIG_BASE 0x31020000
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#define PWRMAN_BASE 0x40004000
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#define USB_CTRL IO_ADDRESS(PWRMAN_BASE + 0x64)
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/* USB_CTRL bit defines */
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#define USB_SLAVE_HCLK_EN (1 << 24)
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#define USB_HOST_NEED_CLK_EN (1 << 21)
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#define USB_OTG_CLK_CTRL IO_ADDRESS(USB_CONFIG_BASE + 0xFF4)
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#define USB_OTG_CLK_STAT IO_ADDRESS(USB_CONFIG_BASE + 0xFF8)
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/* USB_OTG_CLK_CTRL bit defines */
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#define AHB_M_CLOCK_ON (1 << 4)
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#define OTG_CLOCK_ON (1 << 3)
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#define I2C_CLOCK_ON (1 << 2)
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#define DEV_CLOCK_ON (1 << 1)
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#define HOST_CLOCK_ON (1 << 0)
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#define USB_OTG_STAT_CONTROL IO_ADDRESS(USB_CONFIG_BASE + 0x110)
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/* USB_OTG_STAT_CONTROL bit defines */
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#define TRANSPARENT_I2C_EN (1 << 7)
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#define HOST_EN (1 << 0)
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/* ISP1301 USB transceiver I2C registers */
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#define ISP1301_MODE_CONTROL_1 0x04 /* u8 read, set, +1 clear */
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#define MC1_SPEED_REG (1 << 0)
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#define MC1_SUSPEND_REG (1 << 1)
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#define MC1_DAT_SE0 (1 << 2)
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#define MC1_TRANSPARENT (1 << 3)
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#define MC1_BDIS_ACON_EN (1 << 4)
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#define MC1_OE_INT_EN (1 << 5)
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#define MC1_UART_EN (1 << 6)
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#define MC1_MASK 0x7f
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#define ISP1301_MODE_CONTROL_2 0x12 /* u8 read, set, +1 clear */
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#define MC2_GLOBAL_PWR_DN (1 << 0)
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#define MC2_SPD_SUSP_CTRL (1 << 1)
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#define MC2_BI_DI (1 << 2)
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#define MC2_TRANSP_BDIR0 (1 << 3)
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#define MC2_TRANSP_BDIR1 (1 << 4)
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#define MC2_AUDIO_EN (1 << 5)
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#define MC2_PSW_EN (1 << 6)
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#define MC2_EN2V7 (1 << 7)
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#define ISP1301_OTG_CONTROL_1 0x06 /* u8 read, set, +1 clear */
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# define OTG1_DP_PULLUP (1 << 0)
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# define OTG1_DM_PULLUP (1 << 1)
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# define OTG1_DP_PULLDOWN (1 << 2)
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# define OTG1_DM_PULLDOWN (1 << 3)
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# define OTG1_ID_PULLDOWN (1 << 4)
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# define OTG1_VBUS_DRV (1 << 5)
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# define OTG1_VBUS_DISCHRG (1 << 6)
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# define OTG1_VBUS_CHRG (1 << 7)
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#define ISP1301_OTG_STATUS 0x10 /* u8 readonly */
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# define OTG_B_SESS_END (1 << 6)
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# define OTG_B_SESS_VLD (1 << 7)
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#define ISP1301_I2C_ADDR 0x2C
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#define ISP1301_I2C_MODE_CONTROL_1 0x4
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#define ISP1301_I2C_MODE_CONTROL_2 0x12
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#define ISP1301_I2C_OTG_CONTROL_1 0x6
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#define ISP1301_I2C_OTG_CONTROL_2 0x10
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#define ISP1301_I2C_INTERRUPT_SOURCE 0x8
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#define ISP1301_I2C_INTERRUPT_LATCH 0xA
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#define ISP1301_I2C_INTERRUPT_FALLING 0xC
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#define ISP1301_I2C_INTERRUPT_RISING 0xE
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#define ISP1301_I2C_REG_CLEAR_ADDR 1
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/* On LPC32xx, those are undefined */
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#ifndef start_int_set_falling_edge
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#define start_int_set_falling_edge(irq)
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#define start_int_set_rising_edge(irq)
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#define start_int_ack(irq)
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#define start_int_mask(irq)
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#define start_int_umask(irq)
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#endif
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static struct i2c_driver isp1301_driver;
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static struct i2c_client *isp1301_i2c_client;
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extern int usb_disabled(void);
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extern int ocpi_enable(void);
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static struct clk *usb_clk;
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static const unsigned short normal_i2c[] =
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{ ISP1301_I2C_ADDR, ISP1301_I2C_ADDR + 1, I2C_CLIENT_END };
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static int isp1301_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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return 0;
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}
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static int isp1301_remove(struct i2c_client *client)
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{
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return 0;
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}
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static const struct i2c_device_id isp1301_id[] = {
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{ "isp1301_nxp", 0 },
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{ }
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};
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static struct i2c_driver isp1301_driver = {
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.driver = {
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.name = "isp1301_nxp",
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},
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.probe = isp1301_probe,
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.remove = isp1301_remove,
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.id_table = isp1301_id,
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};
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static void isp1301_configure_pnx4008(void)
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{
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/* PNX4008 only supports DAT_SE0 USB mode */
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/* PNX4008 R2A requires setting the MAX603 to output 3.6V */
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/* Power up externel charge-pump */
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i2c_smbus_write_byte_data(isp1301_i2c_client,
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ISP1301_I2C_MODE_CONTROL_1, MC1_DAT_SE0 | MC1_SPEED_REG);
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i2c_smbus_write_byte_data(isp1301_i2c_client,
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ISP1301_I2C_MODE_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR,
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~(MC1_DAT_SE0 | MC1_SPEED_REG));
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i2c_smbus_write_byte_data(isp1301_i2c_client,
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ISP1301_I2C_MODE_CONTROL_2,
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MC2_BI_DI | MC2_PSW_EN | MC2_SPD_SUSP_CTRL);
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i2c_smbus_write_byte_data(isp1301_i2c_client,
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ISP1301_I2C_MODE_CONTROL_2 | ISP1301_I2C_REG_CLEAR_ADDR,
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~(MC2_BI_DI | MC2_PSW_EN | MC2_SPD_SUSP_CTRL));
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i2c_smbus_write_byte_data(isp1301_i2c_client,
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ISP1301_I2C_OTG_CONTROL_1, OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN);
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i2c_smbus_write_byte_data(isp1301_i2c_client,
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ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR,
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~(OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN));
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i2c_smbus_write_byte_data(isp1301_i2c_client,
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ISP1301_I2C_INTERRUPT_LATCH | ISP1301_I2C_REG_CLEAR_ADDR, 0xFF);
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i2c_smbus_write_byte_data(isp1301_i2c_client,
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ISP1301_I2C_INTERRUPT_FALLING | ISP1301_I2C_REG_CLEAR_ADDR,
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0xFF);
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i2c_smbus_write_byte_data(isp1301_i2c_client,
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ISP1301_I2C_INTERRUPT_RISING | ISP1301_I2C_REG_CLEAR_ADDR,
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0xFF);
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}
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static void isp1301_configure_lpc32xx(void)
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{
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/* LPC32XX only supports DAT_SE0 USB mode */
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/* This sequence is important */
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/* Disable transparent UART mode first */
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i2c_smbus_write_byte_data(isp1301_i2c_client,
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(ISP1301_I2C_MODE_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR),
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MC1_UART_EN);
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i2c_smbus_write_byte_data(isp1301_i2c_client,
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(ISP1301_I2C_MODE_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR),
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~MC1_SPEED_REG);
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i2c_smbus_write_byte_data(isp1301_i2c_client,
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ISP1301_I2C_MODE_CONTROL_1, MC1_SPEED_REG);
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i2c_smbus_write_byte_data(isp1301_i2c_client,
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(ISP1301_I2C_MODE_CONTROL_2 | ISP1301_I2C_REG_CLEAR_ADDR),
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~0);
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i2c_smbus_write_byte_data(isp1301_i2c_client,
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ISP1301_I2C_MODE_CONTROL_2,
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(MC2_BI_DI | MC2_PSW_EN | MC2_SPD_SUSP_CTRL));
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i2c_smbus_write_byte_data(isp1301_i2c_client,
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(ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR), ~0);
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i2c_smbus_write_byte_data(isp1301_i2c_client,
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ISP1301_I2C_MODE_CONTROL_1, MC1_DAT_SE0);
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i2c_smbus_write_byte_data(isp1301_i2c_client,
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ISP1301_I2C_OTG_CONTROL_1,
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(OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN));
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i2c_smbus_write_byte_data(isp1301_i2c_client,
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(ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR),
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(OTG1_DM_PULLUP | OTG1_DP_PULLUP));
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i2c_smbus_write_byte_data(isp1301_i2c_client,
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ISP1301_I2C_INTERRUPT_LATCH | ISP1301_I2C_REG_CLEAR_ADDR, ~0);
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i2c_smbus_write_byte_data(isp1301_i2c_client,
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ISP1301_I2C_INTERRUPT_FALLING | ISP1301_I2C_REG_CLEAR_ADDR,
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~0);
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i2c_smbus_write_byte_data(isp1301_i2c_client,
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ISP1301_I2C_INTERRUPT_RISING | ISP1301_I2C_REG_CLEAR_ADDR, ~0);
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/* Enable usb_need_clk clock after transceiver is initialized */
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__raw_writel((__raw_readl(USB_CTRL) | (1 << 22)), USB_CTRL);
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printk(KERN_INFO "ISP1301 Vendor ID : 0x%04x\n",
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i2c_smbus_read_word_data(isp1301_i2c_client, 0x00));
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printk(KERN_INFO "ISP1301 Product ID : 0x%04x\n",
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i2c_smbus_read_word_data(isp1301_i2c_client, 0x02));
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printk(KERN_INFO "ISP1301 Version ID : 0x%04x\n",
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i2c_smbus_read_word_data(isp1301_i2c_client, 0x14));
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}
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static void isp1301_configure(void)
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{
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if (machine_is_pnx4008())
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isp1301_configure_pnx4008();
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else
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isp1301_configure_lpc32xx();
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}
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static inline void isp1301_vbus_on(void)
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{
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i2c_smbus_write_byte_data(isp1301_i2c_client, ISP1301_I2C_OTG_CONTROL_1,
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OTG1_VBUS_DRV);
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}
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static inline void isp1301_vbus_off(void)
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{
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i2c_smbus_write_byte_data(isp1301_i2c_client,
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ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR,
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OTG1_VBUS_DRV);
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}
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static void nxp_start_hc(void)
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{
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unsigned long tmp = __raw_readl(USB_OTG_STAT_CONTROL) | HOST_EN;
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__raw_writel(tmp, USB_OTG_STAT_CONTROL);
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isp1301_vbus_on();
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}
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static void nxp_stop_hc(void)
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{
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unsigned long tmp;
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isp1301_vbus_off();
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tmp = __raw_readl(USB_OTG_STAT_CONTROL) & ~HOST_EN;
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__raw_writel(tmp, USB_OTG_STAT_CONTROL);
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}
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static int __devinit ohci_nxp_start(struct usb_hcd *hcd)
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{
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struct ohci_hcd *ohci = hcd_to_ohci(hcd);
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int ret;
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if ((ret = ohci_init(ohci)) < 0)
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return ret;
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if ((ret = ohci_run(ohci)) < 0) {
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dev_err(hcd->self.controller, "can't start\n");
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ohci_stop(hcd);
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return ret;
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}
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return 0;
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}
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static const struct hc_driver ohci_nxp_hc_driver = {
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.description = hcd_name,
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.product_desc = "nxp OHCI",
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/*
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* generic hardware linkage
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*/
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.irq = ohci_irq,
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.flags = HCD_USB11 | HCD_MEMORY,
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.hcd_priv_size = sizeof(struct ohci_hcd),
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/*
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* basic lifecycle operations
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*/
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.start = ohci_nxp_start,
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.stop = ohci_stop,
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.shutdown = ohci_shutdown,
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/*
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* managing i/o requests and associated device resources
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*/
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.urb_enqueue = ohci_urb_enqueue,
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.urb_dequeue = ohci_urb_dequeue,
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.endpoint_disable = ohci_endpoint_disable,
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/*
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* scheduling support
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*/
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.get_frame_number = ohci_get_frame,
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/*
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* root hub support
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*/
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.hub_status_data = ohci_hub_status_data,
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.hub_control = ohci_hub_control,
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#ifdef CONFIG_PM
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.bus_suspend = ohci_bus_suspend,
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.bus_resume = ohci_bus_resume,
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#endif
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.start_port_reset = ohci_start_port_reset,
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};
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#define USB_CLOCK_MASK (AHB_M_CLOCK_ON| OTG_CLOCK_ON | HOST_CLOCK_ON | I2C_CLOCK_ON)
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static void nxp_set_usb_bits(void)
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{
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if (machine_is_pnx4008()) {
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start_int_set_falling_edge(SE_USB_OTG_ATX_INT_N);
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start_int_ack(SE_USB_OTG_ATX_INT_N);
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start_int_umask(SE_USB_OTG_ATX_INT_N);
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start_int_set_rising_edge(SE_USB_OTG_TIMER_INT);
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start_int_ack(SE_USB_OTG_TIMER_INT);
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start_int_umask(SE_USB_OTG_TIMER_INT);
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start_int_set_rising_edge(SE_USB_I2C_INT);
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start_int_ack(SE_USB_I2C_INT);
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start_int_umask(SE_USB_I2C_INT);
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start_int_set_rising_edge(SE_USB_INT);
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start_int_ack(SE_USB_INT);
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start_int_umask(SE_USB_INT);
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start_int_set_rising_edge(SE_USB_NEED_CLK_INT);
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start_int_ack(SE_USB_NEED_CLK_INT);
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start_int_umask(SE_USB_NEED_CLK_INT);
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start_int_set_rising_edge(SE_USB_AHB_NEED_CLK_INT);
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start_int_ack(SE_USB_AHB_NEED_CLK_INT);
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start_int_umask(SE_USB_AHB_NEED_CLK_INT);
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}
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}
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static void nxp_unset_usb_bits(void)
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{
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if (machine_is_pnx4008()) {
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start_int_mask(SE_USB_OTG_ATX_INT_N);
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start_int_mask(SE_USB_OTG_TIMER_INT);
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start_int_mask(SE_USB_I2C_INT);
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start_int_mask(SE_USB_INT);
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start_int_mask(SE_USB_NEED_CLK_INT);
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start_int_mask(SE_USB_AHB_NEED_CLK_INT);
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}
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}
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static int __devinit usb_hcd_nxp_probe(struct platform_device *pdev)
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{
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struct usb_hcd *hcd = 0;
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struct ohci_hcd *ohci;
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const struct hc_driver *driver = &ohci_nxp_hc_driver;
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struct i2c_adapter *i2c_adap;
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struct i2c_board_info i2c_info;
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int ret = 0, irq;
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dev_dbg(&pdev->dev, "%s: " DRIVER_DESC " (nxp)\n", hcd_name);
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if (usb_disabled()) {
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err("USB is disabled");
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ret = -ENODEV;
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goto out;
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}
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if (pdev->num_resources != 2
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|| pdev->resource[0].flags != IORESOURCE_MEM
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|| pdev->resource[1].flags != IORESOURCE_IRQ) {
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err("Invalid resource configuration");
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ret = -ENODEV;
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goto out;
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}
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/* Enable AHB slave USB clock, needed for further USB clock control */
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__raw_writel(USB_SLAVE_HCLK_EN | (1 << 19), USB_CTRL);
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ret = i2c_add_driver(&isp1301_driver);
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if (ret < 0) {
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err("failed to add ISP1301 driver");
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goto out;
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}
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i2c_adap = i2c_get_adapter(2);
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memset(&i2c_info, 0, sizeof(struct i2c_board_info));
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strlcpy(i2c_info.type, "isp1301_nxp", I2C_NAME_SIZE);
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isp1301_i2c_client = i2c_new_probed_device(i2c_adap, &i2c_info,
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normal_i2c, NULL);
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i2c_put_adapter(i2c_adap);
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if (!isp1301_i2c_client) {
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err("failed to connect I2C to ISP1301 USB Transceiver");
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ret = -ENODEV;
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goto out_i2c_driver;
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}
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isp1301_configure();
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/* Enable USB PLL */
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usb_clk = clk_get(&pdev->dev, "ck_pll5");
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if (IS_ERR(usb_clk)) {
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err("failed to acquire USB PLL");
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|
ret = PTR_ERR(usb_clk);
|
|
goto out1;
|
|
}
|
|
|
|
ret = clk_enable(usb_clk);
|
|
if (ret < 0) {
|
|
err("failed to start USB PLL");
|
|
goto out2;
|
|
}
|
|
|
|
ret = clk_set_rate(usb_clk, 48000);
|
|
if (ret < 0) {
|
|
err("failed to set USB clock rate");
|
|
goto out3;
|
|
}
|
|
|
|
__raw_writel(__raw_readl(USB_CTRL) | USB_HOST_NEED_CLK_EN, USB_CTRL);
|
|
|
|
/* Set to enable all needed USB clocks */
|
|
__raw_writel(USB_CLOCK_MASK, USB_OTG_CLK_CTRL);
|
|
|
|
while ((__raw_readl(USB_OTG_CLK_STAT) & USB_CLOCK_MASK) !=
|
|
USB_CLOCK_MASK) ;
|
|
|
|
hcd = usb_create_hcd (driver, &pdev->dev, dev_name(&pdev->dev));
|
|
if (!hcd) {
|
|
err("Failed to allocate HC buffer");
|
|
ret = -ENOMEM;
|
|
goto out3;
|
|
}
|
|
|
|
/* Set all USB bits in the Start Enable register */
|
|
nxp_set_usb_bits();
|
|
|
|
hcd->rsrc_start = pdev->resource[0].start;
|
|
hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;
|
|
if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
|
|
dev_dbg(&pdev->dev, "request_mem_region failed\n");
|
|
ret = -ENOMEM;
|
|
goto out4;
|
|
}
|
|
hcd->regs = (void __iomem *)pdev->resource[0].start;
|
|
|
|
irq = platform_get_irq(pdev, 0);
|
|
if (irq < 0) {
|
|
ret = -ENXIO;
|
|
goto out4;
|
|
}
|
|
|
|
nxp_start_hc();
|
|
platform_set_drvdata(pdev, hcd);
|
|
ohci = hcd_to_ohci(hcd);
|
|
ohci_hcd_init(ohci);
|
|
|
|
dev_info(&pdev->dev, "at 0x%p, irq %d\n", hcd->regs, hcd->irq);
|
|
ret = usb_add_hcd(hcd, irq, 0);
|
|
if (ret == 0)
|
|
return ret;
|
|
|
|
nxp_stop_hc();
|
|
out4:
|
|
nxp_unset_usb_bits();
|
|
usb_put_hcd(hcd);
|
|
out3:
|
|
clk_disable(usb_clk);
|
|
out2:
|
|
clk_put(usb_clk);
|
|
out1:
|
|
i2c_unregister_device(isp1301_i2c_client);
|
|
isp1301_i2c_client = NULL;
|
|
out_i2c_driver:
|
|
i2c_del_driver(&isp1301_driver);
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static int usb_hcd_nxp_remove(struct platform_device *pdev)
|
|
{
|
|
struct usb_hcd *hcd = platform_get_drvdata(pdev);
|
|
|
|
usb_remove_hcd(hcd);
|
|
nxp_stop_hc();
|
|
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
|
|
usb_put_hcd(hcd);
|
|
nxp_unset_usb_bits();
|
|
clk_disable(usb_clk);
|
|
clk_put(usb_clk);
|
|
i2c_unregister_device(isp1301_i2c_client);
|
|
isp1301_i2c_client = NULL;
|
|
i2c_del_driver(&isp1301_driver);
|
|
|
|
platform_set_drvdata(pdev, NULL);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* work with hotplug and coldplug */
|
|
MODULE_ALIAS("platform:usb-ohci");
|
|
|
|
static struct platform_driver usb_hcd_nxp_driver = {
|
|
.driver = {
|
|
.name = "usb-ohci",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
.probe = usb_hcd_nxp_probe,
|
|
.remove = usb_hcd_nxp_remove,
|
|
};
|
|
|