470 lines
12 KiB
C
470 lines
12 KiB
C
/*
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* drivers/usb/host/ohci-pnx4008.c
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*
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* driver for Philips PNX4008 USB Host
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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 <asm/hardware.h>
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#include <asm/io.h>
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#include <asm/mach-types.h>
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#include <asm/arch/platform.h>
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#include <asm/arch/irqs.h>
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#include <asm/arch/gpio.h>
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#define USB_CTRL IO_ADDRESS(PNX4008_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(PNX4008_USB_CONFIG_BASE + 0xFF4)
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#define USB_OTG_CLK_STAT IO_ADDRESS(PNX4008_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(PNX4008_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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struct i2c_driver isp1301_driver;
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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 int isp1301_probe(struct i2c_adapter *adap);
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static int isp1301_detach(struct i2c_client *client);
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static int isp1301_command(struct i2c_client *client, unsigned int cmd,
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void *arg);
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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 const unsigned short dummy_i2c_addrlist[] = { I2C_CLIENT_END };
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static struct i2c_client_address_data addr_data = {
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.normal_i2c = normal_i2c,
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.probe = dummy_i2c_addrlist,
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.ignore = dummy_i2c_addrlist,
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};
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struct i2c_driver isp1301_driver = {
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.class = I2C_CLASS_HWMON,
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.attach_adapter = isp1301_probe,
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.detach_client = isp1301_detach,
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.command = isp1301_command
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};
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static int isp1301_attach(struct i2c_adapter *adap, int addr, int kind)
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{
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struct i2c_client *c;
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c = kzalloc(sizeof(*c), GFP_KERNEL);
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if (!c)
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return -ENOMEM;
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strcpy(c->name, "isp1301");
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c->flags = 0;
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c->addr = addr;
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c->adapter = adap;
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c->driver = &isp1301_driver;
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isp1301_i2c_client = c;
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return i2c_attach_client(c);
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}
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static int isp1301_probe(struct i2c_adapter *adap)
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{
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return i2c_probe(adap, &addr_data, isp1301_attach);
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}
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static int isp1301_detach(struct i2c_client *client)
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{
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i2c_detach_client(client);
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kfree(isp1301_i2c_client);
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return 0;
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}
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/* No commands defined */
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static int isp1301_command(struct i2c_client *client, unsigned int cmd,
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void *arg)
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{
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return 0;
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}
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static void i2c_write(u8 buf, u8 subaddr)
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{
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char tmpbuf[2];
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tmpbuf[0] = subaddr; /*register number */
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tmpbuf[1] = buf; /*register data */
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i2c_master_send(isp1301_i2c_client, &tmpbuf[0], 2);
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}
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static void isp1301_configure(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_write(MC1_DAT_SE0 | MC1_SPEED_REG, ISP1301_I2C_MODE_CONTROL_1);
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i2c_write(~(MC1_DAT_SE0 | MC1_SPEED_REG),
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ISP1301_I2C_MODE_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR);
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i2c_write(MC2_BI_DI | MC2_PSW_EN | MC2_SPD_SUSP_CTRL,
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ISP1301_I2C_MODE_CONTROL_2);
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i2c_write(~(MC2_BI_DI | MC2_PSW_EN | MC2_SPD_SUSP_CTRL),
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ISP1301_I2C_MODE_CONTROL_2 | ISP1301_I2C_REG_CLEAR_ADDR);
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i2c_write(OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN,
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ISP1301_I2C_OTG_CONTROL_1);
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i2c_write(~(OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN),
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ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR);
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i2c_write(0xFF,
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ISP1301_I2C_INTERRUPT_LATCH | ISP1301_I2C_REG_CLEAR_ADDR);
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i2c_write(0xFF,
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ISP1301_I2C_INTERRUPT_FALLING | ISP1301_I2C_REG_CLEAR_ADDR);
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i2c_write(0xFF,
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ISP1301_I2C_INTERRUPT_RISING | ISP1301_I2C_REG_CLEAR_ADDR);
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}
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static inline void isp1301_vbus_on(void)
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{
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i2c_write(OTG1_VBUS_DRV, ISP1301_I2C_OTG_CONTROL_1);
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}
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static inline void isp1301_vbus_off(void)
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{
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i2c_write(OTG1_VBUS_DRV,
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ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR);
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}
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static void pnx4008_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 pnx4008_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_pnx4008_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_pnx4008_hc_driver = {
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.description = hcd_name,
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.product_desc = "pnx4008 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_pnx4008_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 pnx4008_set_usb_bits(void)
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{
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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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static void pnx4008_unset_usb_bits(void)
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{
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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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static int __devinit usb_hcd_pnx4008_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_pnx4008_hc_driver;
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int ret = 0, irq;
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dev_dbg(&pdev->dev, "%s: " DRIVER_INFO " (pnx4008)\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 connect I2C to ISP1301 USB Transceiver");
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goto out;
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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);
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goto out1;
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}
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ret = clk_enable(usb_clk);
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if (ret < 0) {
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err("failed to start USB PLL");
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goto out2;
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}
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ret = clk_set_rate(usb_clk, 48000);
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if (ret < 0) {
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err("failed to set USB clock rate");
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goto out3;
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}
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__raw_writel(__raw_readl(USB_CTRL) | USB_HOST_NEED_CLK_EN, USB_CTRL);
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/* Set to enable all needed USB clocks */
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__raw_writel(USB_CLOCK_MASK, USB_OTG_CLK_CTRL);
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while ((__raw_readl(USB_OTG_CLK_STAT) & USB_CLOCK_MASK) !=
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USB_CLOCK_MASK) ;
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hcd = usb_create_hcd (driver, &pdev->dev, pdev->dev.bus_id);
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if (!hcd) {
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err("Failed to allocate HC buffer");
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ret = -ENOMEM;
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goto out3;
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}
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/* Set all USB bits in the Start Enable register */
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pnx4008_set_usb_bits();
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hcd->rsrc_start = pdev->resource[0].start;
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hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;
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if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
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dev_dbg(&pdev->dev, "request_mem_region failed\n");
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ret = -ENOMEM;
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goto out4;
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}
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hcd->regs = (void __iomem *)pdev->resource[0].start;
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irq = platform_get_irq(pdev, 0);
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if (irq < 0) {
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ret = -ENXIO;
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goto out4;
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}
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pnx4008_start_hc();
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platform_set_drvdata(pdev, hcd);
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ohci = hcd_to_ohci(hcd);
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ohci_hcd_init(ohci);
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dev_info(&pdev->dev, "at 0x%p, irq %d\n", hcd->regs, hcd->irq);
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ret = usb_add_hcd(hcd, irq, IRQF_DISABLED);
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if (ret == 0)
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return ret;
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pnx4008_stop_hc();
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out4:
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pnx4008_unset_usb_bits();
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usb_put_hcd(hcd);
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out3:
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clk_disable(usb_clk);
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out2:
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clk_put(usb_clk);
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out1:
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i2c_del_driver(&isp1301_driver);
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out:
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return ret;
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}
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static int usb_hcd_pnx4008_remove(struct platform_device *pdev)
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{
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struct usb_hcd *hcd = platform_get_drvdata(pdev);
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usb_remove_hcd(hcd);
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pnx4008_stop_hc();
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release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
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usb_put_hcd(hcd);
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pnx4008_unset_usb_bits();
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clk_disable(usb_clk);
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clk_put(usb_clk);
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i2c_del_driver(&isp1301_driver);
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platform_set_drvdata(pdev, NULL);
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return 0;
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}
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/* work with hotplug and coldplug */
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MODULE_ALIAS("platform:usb-ohci");
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static struct platform_driver usb_hcd_pnx4008_driver = {
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.driver = {
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.name = "usb-ohci",
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.owner = THIS_MODULE,
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},
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.probe = usb_hcd_pnx4008_probe,
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.remove = usb_hcd_pnx4008_remove,
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};
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