diff options
Diffstat (limited to 'src/soc/intel')
| -rw-r--r-- | src/soc/intel/quark/Makefile.inc | 1 | ||||
| -rw-r--r-- | src/soc/intel/quark/gpio_i2c.c | 195 | ||||
| -rw-r--r-- | src/soc/intel/quark/include/soc/i2c.h | 131 | ||||
| -rw-r--r-- | src/soc/intel/quark/include/soc/ramstage.h | 2 | ||||
| -rw-r--r-- | src/soc/intel/quark/include/soc/reg_access.h | 1 | ||||
| -rw-r--r-- | src/soc/intel/quark/reg_access.c | 65 |
6 files changed, 369 insertions, 26 deletions
diff --git a/src/soc/intel/quark/Makefile.inc b/src/soc/intel/quark/Makefile.inc index 3a865b8697..b63e613f7b 100644 --- a/src/soc/intel/quark/Makefile.inc +++ b/src/soc/intel/quark/Makefile.inc @@ -25,6 +25,7 @@ romstage-$(CONFIG_ENABLE_BUILTIN_HSUART1) += uart_common.c ramstage-$(CONFIG_HAVE_ACPI_TABLES) += acpi.c ramstage-y += chip.c +ramstage-y += gpio_i2c.c ramstage-y += memmap.c ramstage-y += northcluster.c ramstage-y += pmc.c diff --git a/src/soc/intel/quark/gpio_i2c.c b/src/soc/intel/quark/gpio_i2c.c new file mode 100644 index 0000000000..d23a90553c --- /dev/null +++ b/src/soc/intel/quark/gpio_i2c.c @@ -0,0 +1,195 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2016 Intel Corporation. + * + * 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; version 2 of the License. + * + * 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. + */ + +#include <console/console.h> +#include <delay.h> +#include <device/device.h> +#include <device/i2c.h> +#include <device/pci.h> +#include <device/pci_ids.h> +#include <soc/i2c.h> +#include <soc/ramstage.h> +#include <soc/reg_access.h> + +static void i2c_disable(I2C_REGS *regs) +{ + uint32_t status; + uint32_t timeout; + + /* Disable I2C controller */ + regs->ic_enable = 0; + + /* Wait for the enable bit to clear */ + timeout = 1 * 1000 * 1000; + status = regs->ic_enable_status; + while (status & IC_ENABLE_CONTROLLER) { + udelay(1); + if (--timeout == 0) + die("ERROR - I2C failed to disable!\n"); + status = regs->ic_enable_status; + } + + /* Clear any pending interrupts */ + status = regs->ic_clr_intr; +} + +int platform_i2c_transfer(unsigned bus, struct i2c_seg *segments, int count) +{ + uint8_t *buffer; + int bytes_transferred; + uint8_t chip; + uint32_t cmd; + int length; + int read_length; + I2C_REGS *regs; + uint32_t status; + uint32_t timeout; + + regs = get_i2c_address(); + + /* Disable the I2C controller to get access to the registers */ + i2c_disable(regs); + + /* Set the slave address */ + ASSERT (count > 0); + ASSERT (segments != NULL); + ASSERT (segments->read == 0); + + /* Clear the start and stop detection */ + status = regs->ic_clr_start_det; + status = regs->ic_clr_stop_det; + + /* Set addressing mode to 7-bit and fast mode */ + cmd = regs->ic_con; + cmd &= ~(IC_CON_10B | IC_CON_SPEED); + cmd |= IC_CON_RESTART_EN | IC_CON_7B | IC_CON_SPEED_100_KHz + | IC_CON_MASTER_MODE; + regs->ic_con = cmd; + + /* Set the target chip address */ + chip = segments->chip; + regs->ic_tar = chip; + + /* Enable the I2C controller */ + regs->ic_enable = IC_ENABLE_CONTROLLER; + + /* Clear the interrupts */ + status = regs->ic_clr_rx_under; + status = regs->ic_clr_rx_over; + status = regs->ic_clr_tx_over; + status = regs->ic_clr_tx_abrt; + + /* Process each of the segments */ + bytes_transferred = 0; + read_length = 0; + buffer = NULL; + while (count-- > 0) { + buffer = segments->buf; + length = segments->len; + ASSERT (buffer != NULL); + ASSERT (length >= 1); + ASSERT (segments->chip = chip); + + if (segments->read) { + /* Place read commands into the FIFO */ + read_length = length; + while (length > 0) { + /* Send stop bit after last byte */ + cmd = IC_DATA_CMD_READ; + if ((count == 0) && (length == 1)) + cmd |= IC_DATA_CMD_STOP; + + /* Place read command in transmit FIFO */ + regs->ic_data_cmd = cmd; + length--; + } + } else { + /* Write the data into the FIFO */ + while (length > 0) { + /* End of the transaction? */ + cmd = IC_DATA_CMD_WRITE | *buffer++; + if ((count == 0) && (length == 1)) + cmd |= IC_DATA_CMD_STOP; + + /* Place a data byte into the FIFO */ + regs->ic_data_cmd = cmd; + length--; + bytes_transferred++; + } + } + segments++; + } + + /* Wait for the end of the transaction */ + timeout = 1 * 1000 * 1000; + do { + status = regs->ic_raw_intr_stat; + if (status & IC_INTR_STOP_DET) + break; + if ((status & (IC_INTR_RX_OVER | IC_INTR_RX_UNDER + | IC_INTR_TX_ABRT | IC_INTR_TX_OVER)) + || (timeout == 0)) { + if (timeout == 0) + printk (BIOS_ERR, + "ERROR - I2C stop bit not received!\n"); + if (status & IC_INTR_RX_OVER) + printk (BIOS_ERR, + "ERROR - I2C receive overrun!\n"); + if (status & IC_INTR_RX_UNDER) + printk (BIOS_ERR, + "ERROR - I2C receive underrun!\n"); + if (status & IC_INTR_TX_ABRT) + printk (BIOS_ERR, + "ERROR - I2C transmit abort!\n"); + if (status & IC_INTR_TX_OVER) + printk (BIOS_ERR, + "ERROR - I2C transmit overrun!\n"); + i2c_disable(regs); + return -1; + } + timeout--; + udelay(1); + } while(1); + + /* Finish reading the data bytes */ + while (read_length > 0) { + status = regs->ic_status; + *buffer++ = (UINT8)regs->ic_data_cmd; + read_length--; + bytes_transferred++; + status = regs->ic_status; + } + + return bytes_transferred; +} + +__attribute__((weak)) void mainboard_gpio_i2c_init(device_t dev) +{ + /* Initialize any of the GPIOs or I2C devices */ + printk(BIOS_SPEW, "WEAK; mainboard_gpio_i2c_init\n"); +} + +static struct device_operations device_ops = { + .read_resources = pci_dev_read_resources, + .set_resources = pci_dev_set_resources, + .enable_resources = pci_dev_enable_resources, + .init = mainboard_gpio_i2c_init, +}; + +static const struct pci_driver gfx_driver __pci_driver = { + .ops = &device_ops, + .vendor = PCI_VENDOR_ID_INTEL, + .device = I2CGPIO_DEVID, +}; diff --git a/src/soc/intel/quark/include/soc/i2c.h b/src/soc/intel/quark/include/soc/i2c.h new file mode 100644 index 0000000000..85ae7b9e3e --- /dev/null +++ b/src/soc/intel/quark/include/soc/i2c.h @@ -0,0 +1,131 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2016 Intel Corporation. + * + * 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; version 2 of the License. + * + * 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. + */ + +#ifndef _QUARK_I2C_H_ +#define _QUARK_I2C_H_ + +typedef volatile struct _I2C_REGS { + volatile uint32_t ic_con; /* 00: Control Register */ + volatile uint32_t ic_tar; /* 04: Master Target Address */ + uint32_t reserved_08[2]; + volatile uint32_t ic_data_cmd; /* 10: Data Buffer & Command */ + uint32_t ic_ss_scl_hcnt; /* 14: Standard Speed Clock SCL High Count */ + uint32_t ic_ss_scl_lcnt; /* 18: Standard Speed Clock SCL Low Count */ + uint32_t ic_fs_scl_hcnt; /* 1c: Fast Speed Clock SCL High Count */ + uint32_t ic_fs_scl_lcnt; /* 20: Fast Speed Clock SCL Low Count */ + uint32_t reserved_24[2]; + volatile uint32_t ic_intr_stat; /* 2c: Interrupt Status */ + uint32_t ic_intr_mask; /* 30: Interrupt Mask */ + uint32_t ic_raw_intr_stat; /* 34: Raw Interrupt Status */ + uint32_t ic_rx_tl; /* 38: Receive FIFO Threshold Level */ + uint32_t ic_tx_tl; /* 3c: Transmit FIFO Threshold Level */ + uint32_t ic_clr_intr; /* 40: Clear Combined/Individual Interrupt */ + uint32_t ic_clr_rx_under; /* 44: Clear RX_UNDER Interrupt */ + uint32_t ic_clr_rx_over; /* 48: Clear RX_OVER Interrupt */ + uint32_t ic_clr_tx_over; /* 4c: Clear TX_OVER Interrupt */ + uint32_t ic_clr_rd_req; /* 50: Clear RD_REQ Interrupt */ + uint32_t ic_clr_tx_abrt; /* 54: Clear TX_ABRT Interrupt */ + uint32_t reserved_58; + uint32_t ic_clr_activity; /* 5c: Clear ACTIVITY Interrupt */ + uint32_t ic_clr_stop_det; /* 60: Clear STOP_DET Interrupt */ + uint32_t ic_clr_start_det; /* 64: Clear START_DET Interrupt */ + uint32_t reserved_68; + volatile uint32_t ic_enable; /* 6c: Enable */ + volatile uint32_t ic_status; /* 70: Status */ + uint32_t ic_txflr; /* 74: Transmit FIFO Level */ + uint32_t ic_rxflr; /* 78: Receive FIFO Level */ + uint32_t ic_sda_hold; /* 7c: SDA Hold */ + volatile uint32_t ic_tx_abrt_source; /* 80: Transmit Abort Source */ + uint32_t reserved_84[6]; + volatile uint32_t ic_enable_status; /* 9c: Enable Status */ + uint32_t ic_fs_spklen; /* a0: SS and FS Spike Suppression Limit */ +} I2C_REGS; + +#define IC_CON offsetof(I2C_REGS, ic_con) +#define IC_TAR offsetof(I2C_REGS, ic_tar) +#define IC_DATA_CMD offsetof(I2C_REGS, ic_data_cmd) +#define IC_SS_SCL_HCNT offsetof(I2C_REGS, ic_ss_scl_hcnt) +#define IC_SS_SCL_LCNT offsetof(I2C_REGS, ic_ss_scl_lcnt) +#define IC_FS_SCL_HCNT offsetof(I2C_REGS, ic_fs_scl_hcnt) +#define IC_FS_SCL_LCNT offsetof(I2C_REGS, ic_fs_scl_lcnt) +#define IC_INTR_STAT offsetof(I2C_REGS, ic_intr_stat) +#define IC_INTR_MASK offsetof(I2C_REGS, ic_intr_mask) +#define IC_RAW_INTR_STAT offsetof(I2C_REGS, ic_raw_intr_stat) +#define IC_RX_TL offsetof(I2C_REGS, ic_rx_tl) +#define IC_TX_TL offsetof(I2C_REGS, ic_tx_tl) +#define IC_CLR_INTR offsetof(I2C_REGS, ic_clr_intr) +#define IC_CLR_RX_UNDER offsetof(I2C_REGS, ic_clr_rx_under) +#define IC_CLR_RX_OVER offsetof(I2C_REGS, ic_clr_rx_over) +#define IC_CLR_TX_OVER offsetof(I2C_REGS, ic_clr_tx_over) +#define IC_CLR_RD_REQ offsetof(I2C_REGS, ic_clr_rd_req) +#define IC_CLR_TX_ABRT offsetof(I2C_REGS, ic_clr_tx_abrt) +#define IC_CLR_ACTIVITY offsetof(I2C_REGS, ic_clr_activity) +#define IC_CLR_STOP_DET offsetof(I2C_REGS, ic_clr_stop_det) +#define IC_CLR_START_DET offsetof(I2C_REGS, ic_clr_start_det) +#define IC_ENABLE offsetof(I2C_REGS, ic_enable) +#define IC_STATUS offsetof(I2C_REGS, ic_status) +#define IC_TXFLR offsetof(I2C_REGS, ic_txflr) +#define IC_RXFLR offsetof(I2C_REGS, ic_rxflr) +#define IC_SDA_HOLD offsetof(I2C_REGS, ic_sda_hold) +#define IC_TX_ABRT_SOURCE offsetof(I2C_REGS, ic_tx_abrt_source) +#define IC_ENABLE_STATUS offsetof(I2C_REGS, ic_enable_status) +#define IC_FS_SPKLEN offsetof(I2C_REGS, ic_fs_spklen) + +/* 0x00: ic_con */ +#define IC_CON_RESTART_EN 0x00000020 /* Enable start/restart */ +#define IC_CON_10B 0x00000010 /* 10-bit addressing */ +#define IC_CON_7B 0 /* 7-bit addressing */ +#define IC_CON_SPEED 0x00000006 /* I2C bus speed */ +#define IC_CON_SPEED_400_KHz 0x00000004 /* Fast mode */ +#define IC_CON_SPEED_100_KHz 0x00000002 /* Standard mode */ +#define IC_CON_MASTER_MODE 0x00000001 /* Enable master mode */ + +/* 0x10: ic_data_cmd */ +#define IC_DATA_CMD_RESTART 0x00000400 /* Send restart before byte */ +#define IC_DATA_CMD_STOP 0x00000200 /* Send stop after byte */ +#define IC_DATA_CMD_CMD 0x00000100 /* Type of transaction */ +#define IC_DATA_CMD_READ IC_DATA_CMD_CMD +#define IC_DATA_CMD_WRITE 0 +#define IC_DATA_CMD_DATA 0x000000ff /* Data byte */ + +/* 0x2c: ic_intr_stat + * 0x30: ic_intr_mask + * 0x34: ic_raw_intr_stat + */ +#define IC_INTR_START_DET 0x00000400 /* Start bit detected */ +#define IC_INTR_STOP_DET 0x00000200 /* Stop bit detected */ +#define IC_INTR_ACTIVITY 0x00000100 /* Activity detected */ +#define IC_INTR_TX_ABRT 0x00000040 /* Transmit abort */ +#define IC_INTR_RD_REQ 0x00000020 /* Read request */ +#define IC_INTR_TX_EMPTY 0x00000010 /* TX FIFO is empty */ +#define IC_INTR_TX_OVER 0x00000008 /* TX FIFO overflow */ +#define IC_INTR_RX_FULL 0x00000004 /* Receive FIFO is full */ +#define IC_INTR_RX_OVER 0x00000002 /* Receive FIFO overflow */ +#define IC_INTR_RX_UNDER 0x00000001 /* Receive FIFO underflow */ + +/* 0x6c: ic_enable + * 0x9c: ic_enable_status + */ +#define IC_ENABLE_CONTROLLER 0x00000001 /* Enable the I2C controller */ + +/* 0x70: ic_status */ +#define IC_STATUS_MST_ACTIVITY 0x00000020 /* Master FSM activity */ +#define IC_STATUS_RFF 0x00000010 /* Receive FIFO completely full */ +#define IC_STATUS_RFNE 0x00000008 /* Receive FIFO not empty */ +#define IC_STATUS_TFE 0x00000004 /* Transmit FIFO completely empty */ +#define IC_STATUS_TFNF 0x00000002 /* Transmit FIFO not full */ +#define IC_STATUS_ACTIVITY 0x00000001 /* Activity */ + +#endif /* _QUARK_I2C_H_ */ diff --git a/src/soc/intel/quark/include/soc/ramstage.h b/src/soc/intel/quark/include/soc/ramstage.h index 19b27a86d4..80e2f0081b 100644 --- a/src/soc/intel/quark/include/soc/ramstage.h +++ b/src/soc/intel/quark/include/soc/ramstage.h @@ -22,4 +22,6 @@ #include <fsp/ramstage.h> #include <soc/QuarkNcSocId.h> +void mainboard_gpio_i2c_init(device_t dev); + #endif /* _SOC_RAMSTAGE_H_ */ diff --git a/src/soc/intel/quark/include/soc/reg_access.h b/src/soc/intel/quark/include/soc/reg_access.h index c1b0df007b..66ab7b8621 100644 --- a/src/soc/intel/quark/include/soc/reg_access.h +++ b/src/soc/intel/quark/include/soc/reg_access.h @@ -150,6 +150,7 @@ enum { #define REG_USB_XOR(reg_, value_) \ REG_USB_RXW(reg_, 0xffffffff, value_) +void *get_i2c_address(void); void mainboard_gpio_init(void); void mcr_write(uint8_t opcode, uint8_t port, uint32_t reg_address); uint32_t mdr_read(void); diff --git a/src/soc/intel/quark/reg_access.c b/src/soc/intel/quark/reg_access.c index 48d55210d3..4734135b2c 100644 --- a/src/soc/intel/quark/reg_access.c +++ b/src/soc/intel/quark/reg_access.c @@ -20,6 +20,45 @@ #include <soc/pci_devs.h> #include <soc/reg_access.h> +static uint32_t *get_gpio_address(uint32_t reg_address) +{ + uint32_t gpio_base_address; + + /* Get the GPIO base address */ + gpio_base_address = pci_read_config32(I2CGPIO_BDF, PCI_BASE_ADDRESS_1); + gpio_base_address &= ~PCI_BASE_ADDRESS_MEM_ATTR_MASK; + ASSERT (gpio_base_address != 0x00000000); + + /* Return the GPIO register address */ + return (uint32_t *)(gpio_base_address + reg_address); +} + +void *get_i2c_address(void) +{ + uint32_t gpio_base_address; + + /* Get the GPIO base address */ + gpio_base_address = pci_read_config32(I2CGPIO_BDF, PCI_BASE_ADDRESS_0); + gpio_base_address &= ~PCI_BASE_ADDRESS_MEM_ATTR_MASK; + ASSERT (gpio_base_address != 0x00000000); + + /* Return the GPIO register address */ + return (void *)gpio_base_address; +} + +static uint16_t get_legacy_gpio_address(uint32_t reg_address) +{ + uint32_t gpio_base_address; + + /* Get the GPIO base address */ + gpio_base_address = pci_read_config32(LPC_BDF, R_QNC_LPC_GBA_BASE); + ASSERT (gpio_base_address >= 0x80000000); + gpio_base_address &= B_QNC_LPC_GPA_BASE_MASK; + + /* Return the GPIO register address */ + return (uint16_t)(gpio_base_address + reg_address); +} + void mcr_write(uint8_t opcode, uint8_t port, uint32_t reg_address) { pci_write_config32(MC_BDF, QNC_ACCESS_PORT_MCR, @@ -45,19 +84,6 @@ void mea_write(uint32_t reg_address) & QNC_MEA_MASK); } -static uint32_t *get_gpio_address(uint32_t reg_address) -{ - uint32_t gpio_base_address; - - /* Get the GPIO base address */ - gpio_base_address = pci_read_config32(I2CGPIO_BDF, PCI_BASE_ADDRESS_1); - gpio_base_address &= ~PCI_BASE_ADDRESS_MEM_ATTR_MASK; - ASSERT (gpio_base_address != 0x00000000); - - /* Return the GPIO register address */ - return (uint32_t *)(gpio_base_address + reg_address); -} - static uint32_t reg_gpio_read(uint32_t reg_address) { /* Read the GPIO register */ @@ -70,19 +96,6 @@ static void reg_gpio_write(uint32_t reg_address, uint32_t value) *get_gpio_address(reg_address) = value; } -static uint16_t get_legacy_gpio_address(uint32_t reg_address) -{ - uint32_t gpio_base_address; - - /* Get the GPIO base address */ - gpio_base_address = pci_read_config32(LPC_BDF, R_QNC_LPC_GBA_BASE); - ASSERT (gpio_base_address >= 0x80000000); - gpio_base_address &= B_QNC_LPC_GPA_BASE_MASK; - - /* Return the GPIO register address */ - return (uint16_t)(gpio_base_address + reg_address); -} - uint32_t reg_legacy_gpio_read(uint32_t reg_address) { /* Read the legacy GPIO register */ |