diff options
| -rw-r--r-- | drivers/spi/Makefile | 1 | ||||
| -rw-r--r-- | drivers/spi/ich.c | 749 | ||||
| -rw-r--r-- | drivers/spi/ich.h | 143 |
3 files changed, 893 insertions, 0 deletions
diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile index 45862ec93..42685955d 100644 --- a/drivers/spi/Makefile +++ b/drivers/spi/Makefile @@ -39,6 +39,7 @@ COBJS-$(CONFIG_CF_SPI) += cf_spi.o COBJS-$(CONFIG_CF_QSPI) += cf_qspi.o COBJS-$(CONFIG_DAVINCI_SPI) += davinci_spi.o COBJS-$(CONFIG_EXYNOS_SPI) += exynos_spi.o +COBJS-$(CONFIG_ICH_SPI) += ich.o COBJS-$(CONFIG_KIRKWOOD_SPI) += kirkwood_spi.o COBJS-$(CONFIG_MPC52XX_SPI) += mpc52xx_spi.o COBJS-$(CONFIG_MPC8XXX_SPI) += mpc8xxx_spi.o diff --git a/drivers/spi/ich.c b/drivers/spi/ich.c new file mode 100644 index 000000000..ef1ce1d96 --- /dev/null +++ b/drivers/spi/ich.c @@ -0,0 +1,749 @@ +/* + * Copyright (c) 2011-12 The Chromium OS Authors. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but without any warranty; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + * + * This file is derived from the flashrom project. + */ + +#include <common.h> +#include <malloc.h> +#include <spi.h> +#include <pci.h> +#include <pci_ids.h> +#include <asm/io.h> + +#include "ich.h" + +#define SPI_OPCODE_WREN 0x06 +#define SPI_OPCODE_FAST_READ 0x0b + +struct ich_ctlr { + pci_dev_t dev; /* PCI device number */ + int ich_version; /* Controller version, 7 or 9 */ + int ichspi_lock; + int locked; + uint8_t *opmenu; + int menubytes; + void *base; /* Base of register set */ + uint16_t *preop; + uint16_t *optype; + uint32_t *addr; + uint8_t *data; + unsigned databytes; + uint8_t *status; + uint16_t *control; + uint32_t *bbar; + uint32_t *pr; /* only for ich9 */ + uint8_t *speed; /* pointer to speed control */ + ulong max_speed; /* Maximum bus speed in MHz */ +}; + +struct ich_ctlr ctlr; + +static inline struct ich_spi_slave *to_ich_spi(struct spi_slave *slave) +{ + return container_of(slave, struct ich_spi_slave, slave); +} + +static unsigned int ich_reg(const void *addr) +{ + return (unsigned)(addr - ctlr.base) & 0xffff; +} + +static u8 ich_readb(const void *addr) +{ + u8 value = readb(addr); + + debug("read %2.2x from %4.4x\n", value, ich_reg(addr)); + + return value; +} + +static u16 ich_readw(const void *addr) +{ + u16 value = readw(addr); + + debug("read %4.4x from %4.4x\n", value, ich_reg(addr)); + + return value; +} + +static u32 ich_readl(const void *addr) +{ + u32 value = readl(addr); + + debug("read %8.8x from %4.4x\n", value, ich_reg(addr)); + + return value; +} + +static void ich_writeb(u8 value, void *addr) +{ + writeb(value, addr); + debug("wrote %2.2x to %4.4x\n", value, ich_reg(addr)); +} + +static void ich_writew(u16 value, void *addr) +{ + writew(value, addr); + debug("wrote %4.4x to %4.4x\n", value, ich_reg(addr)); +} + +static void ich_writel(u32 value, void *addr) +{ + writel(value, addr); + debug("wrote %8.8x to %4.4x\n", value, ich_reg(addr)); +} + +static void write_reg(const void *value, void *dest, uint32_t size) +{ + memcpy_toio(dest, value, size); +} + +static void read_reg(const void *src, void *value, uint32_t size) +{ + memcpy_fromio(value, src, size); +} + +static void ich_set_bbar(struct ich_ctlr *ctlr, uint32_t minaddr) +{ + const uint32_t bbar_mask = 0x00ffff00; + uint32_t ichspi_bbar; + + minaddr &= bbar_mask; + ichspi_bbar = ich_readl(ctlr->bbar) & ~bbar_mask; + ichspi_bbar |= minaddr; + ich_writel(ichspi_bbar, ctlr->bbar); +} + +int spi_cs_is_valid(unsigned int bus, unsigned int cs) +{ + puts("spi_cs_is_valid used but not implemented\n"); + return 0; +} + +struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs, + unsigned int max_hz, unsigned int mode) +{ + struct ich_spi_slave *ich; + + ich = spi_alloc_slave(struct ich_spi_slave, bus, cs); + if (!ich) { + puts("ICH SPI: Out of memory\n"); + return NULL; + } + + ich->speed = max_hz; + + return &ich->slave; +} + +void spi_free_slave(struct spi_slave *slave) +{ + struct ich_spi_slave *ich = to_ich_spi(slave); + + free(ich); +} + +/* + * Check if this device ID matches one of supported Intel PCH devices. + * + * Return the ICH version if there is a match, or zero otherwise. + */ +static int get_ich_version(uint16_t device_id) +{ + if (device_id == PCI_DEVICE_ID_INTEL_TGP_LPC) + return 7; + + if ((device_id >= PCI_DEVICE_ID_INTEL_COUGARPOINT_LPC_MIN && + device_id <= PCI_DEVICE_ID_INTEL_COUGARPOINT_LPC_MAX) || + (device_id >= PCI_DEVICE_ID_INTEL_PANTHERPOINT_LPC_MIN && + device_id <= PCI_DEVICE_ID_INTEL_PANTHERPOINT_LPC_MAX)) + return 9; + + return 0; +} + +/* @return 1 if the SPI flash supports the 33MHz speed */ +static int ich9_can_do_33mhz(pci_dev_t dev) +{ + u32 fdod, speed; + + /* Observe SPI Descriptor Component Section 0 */ + pci_write_config_dword(dev, 0xb0, 0x1000); + + /* Extract the Write/Erase SPI Frequency from descriptor */ + pci_read_config_dword(dev, 0xb4, &fdod); + + /* Bits 23:21 have the fast read clock frequency, 0=20MHz, 1=33MHz */ + speed = (fdod >> 21) & 7; + + return speed == 1; +} + +static int ich_find_spi_controller(pci_dev_t *devp, int *ich_versionp) +{ + int last_bus = pci_last_busno(); + int bus; + + if (last_bus == -1) { + debug("No PCI busses?\n"); + return -1; + } + + for (bus = 0; bus <= last_bus; bus++) { + uint16_t vendor_id, device_id; + uint32_t ids; + pci_dev_t dev; + + dev = PCI_BDF(bus, 31, 0); + pci_read_config_dword(dev, 0, &ids); + vendor_id = ids; + device_id = ids >> 16; + + if (vendor_id == PCI_VENDOR_ID_INTEL) { + *devp = dev; + *ich_versionp = get_ich_version(device_id); + return 0; + } + } + + debug("ICH SPI: No ICH found.\n"); + return -1; +} + +static int ich_init_controller(struct ich_ctlr *ctlr) +{ + uint8_t *rcrb; /* Root Complex Register Block */ + uint32_t rcba; /* Root Complex Base Address */ + + pci_read_config_dword(ctlr->dev, 0xf0, &rcba); + /* Bits 31-14 are the base address, 13-1 are reserved, 0 is enable. */ + rcrb = (uint8_t *)(rcba & 0xffffc000); + if (ctlr->ich_version == 7) { + struct ich7_spi_regs *ich7_spi; + + ich7_spi = (struct ich7_spi_regs *)(rcrb + 0x3020); + ctlr->ichspi_lock = ich_readw(&ich7_spi->spis) & SPIS_LOCK; + ctlr->opmenu = ich7_spi->opmenu; + ctlr->menubytes = sizeof(ich7_spi->opmenu); + ctlr->optype = &ich7_spi->optype; + ctlr->addr = &ich7_spi->spia; + ctlr->data = (uint8_t *)ich7_spi->spid; + ctlr->databytes = sizeof(ich7_spi->spid); + ctlr->status = (uint8_t *)&ich7_spi->spis; + ctlr->control = &ich7_spi->spic; + ctlr->bbar = &ich7_spi->bbar; + ctlr->preop = &ich7_spi->preop; + ctlr->base = ich7_spi; + } else if (ctlr->ich_version == 9) { + struct ich9_spi_regs *ich9_spi; + + ich9_spi = (struct ich9_spi_regs *)(rcrb + 0x3800); + ctlr->ichspi_lock = ich_readw(&ich9_spi->hsfs) & HSFS_FLOCKDN; + ctlr->opmenu = ich9_spi->opmenu; + ctlr->menubytes = sizeof(ich9_spi->opmenu); + ctlr->optype = &ich9_spi->optype; + ctlr->addr = &ich9_spi->faddr; + ctlr->data = (uint8_t *)ich9_spi->fdata; + ctlr->databytes = sizeof(ich9_spi->fdata); + ctlr->status = &ich9_spi->ssfs; + ctlr->control = (uint16_t *)ich9_spi->ssfc; + ctlr->speed = ich9_spi->ssfc + 2; + ctlr->bbar = &ich9_spi->bbar; + ctlr->preop = &ich9_spi->preop; + ctlr->pr = &ich9_spi->pr[0]; + ctlr->base = ich9_spi; + } else { + debug("ICH SPI: Unrecognized ICH version %d.\n", + ctlr->ich_version); + return -1; + } + debug("ICH SPI: Version %d detected\n", ctlr->ich_version); + + /* Work out the maximum speed we can support */ + ctlr->max_speed = 20000000; + if (ctlr->ich_version == 9 && ich9_can_do_33mhz(ctlr->dev)) + ctlr->max_speed = 33000000; + + ich_set_bbar(ctlr, 0); + + return 0; +} + +void spi_init(void) +{ + uint8_t bios_cntl; + + if (ich_find_spi_controller(&ctlr.dev, &ctlr.ich_version)) { + printf("ICH SPI: Cannot find device\n"); + return; + } + + if (ich_init_controller(&ctlr)) { + printf("ICH SPI: Cannot setup controller\n"); + return; + } + + /* + * Disable the BIOS write protect so write commands are allowed. On + * v9, deassert SMM BIOS Write Protect Disable. + */ + pci_read_config_byte(ctlr.dev, 0xdc, &bios_cntl); + if (ctlr.ich_version == 9) + bios_cntl &= ~(1 << 5); + pci_write_config_byte(ctlr.dev, 0xdc, bios_cntl | 0x1); +} + +int spi_claim_bus(struct spi_slave *slave) +{ + /* Handled by ICH automatically. */ + return 0; +} + +void spi_release_bus(struct spi_slave *slave) +{ + /* Handled by ICH automatically. */ +} + +void spi_cs_activate(struct spi_slave *slave) +{ + /* Handled by ICH automatically. */ +} + +void spi_cs_deactivate(struct spi_slave *slave) +{ + /* Handled by ICH automatically. */ +} + +static inline void spi_use_out(struct spi_trans *trans, unsigned bytes) +{ + trans->out += bytes; + trans->bytesout -= bytes; +} + +static inline void spi_use_in(struct spi_trans *trans, unsigned bytes) +{ + trans->in += bytes; + trans->bytesin -= bytes; +} + +static void spi_setup_type(struct spi_trans *trans, int data_bytes) +{ + trans->type = 0xFF; + + /* Try to guess spi type from read/write sizes. */ + if (trans->bytesin == 0) { + if (trans->bytesout + data_bytes > 4) + /* + * If bytesin = 0 and bytesout > 4, we presume this is + * a write data operation, which is accompanied by an + * address. + */ + trans->type = SPI_OPCODE_TYPE_WRITE_WITH_ADDRESS; + else + trans->type = SPI_OPCODE_TYPE_WRITE_NO_ADDRESS; + return; + } + + if (trans->bytesout == 1) { /* and bytesin is > 0 */ + trans->type = SPI_OPCODE_TYPE_READ_NO_ADDRESS; + return; + } + + if (trans->bytesout == 4) /* and bytesin is > 0 */ + trans->type = SPI_OPCODE_TYPE_READ_WITH_ADDRESS; + + /* Fast read command is called with 5 bytes instead of 4 */ + if (trans->out[0] == SPI_OPCODE_FAST_READ && trans->bytesout == 5) { + trans->type = SPI_OPCODE_TYPE_READ_WITH_ADDRESS; + --trans->bytesout; + } +} + +static int spi_setup_opcode(struct spi_trans *trans) +{ + uint16_t optypes; + uint8_t opmenu[ctlr.menubytes]; + + trans->opcode = trans->out[0]; + spi_use_out(trans, 1); + if (!ctlr.ichspi_lock) { + /* The lock is off, so just use index 0. */ + ich_writeb(trans->opcode, ctlr.opmenu); + optypes = ich_readw(ctlr.optype); + optypes = (optypes & 0xfffc) | (trans->type & 0x3); + ich_writew(optypes, ctlr.optype); + return 0; + } else { + /* The lock is on. See if what we need is on the menu. */ + uint8_t optype; + uint16_t opcode_index; + + /* Write Enable is handled as atomic prefix */ + if (trans->opcode == SPI_OPCODE_WREN) + return 0; + + read_reg(ctlr.opmenu, opmenu, sizeof(opmenu)); + for (opcode_index = 0; opcode_index < ctlr.menubytes; + opcode_index++) { + if (opmenu[opcode_index] == trans->opcode) + break; + } + + if (opcode_index == ctlr.menubytes) { + printf("ICH SPI: Opcode %x not found\n", + trans->opcode); + return -1; + } + + optypes = ich_readw(ctlr.optype); + optype = (optypes >> (opcode_index * 2)) & 0x3; + if (trans->type == SPI_OPCODE_TYPE_WRITE_NO_ADDRESS && + optype == SPI_OPCODE_TYPE_WRITE_WITH_ADDRESS && + trans->bytesout >= 3) { + /* We guessed wrong earlier. Fix it up. */ + trans->type = optype; + } + if (optype != trans->type) { + printf("ICH SPI: Transaction doesn't fit type %d\n", + optype); + return -1; + } + return opcode_index; + } +} + +static int spi_setup_offset(struct spi_trans *trans) +{ + /* Separate the SPI address and data. */ + switch (trans->type) { + case SPI_OPCODE_TYPE_READ_NO_ADDRESS: + case SPI_OPCODE_TYPE_WRITE_NO_ADDRESS: + return 0; + case SPI_OPCODE_TYPE_READ_WITH_ADDRESS: + case SPI_OPCODE_TYPE_WRITE_WITH_ADDRESS: + trans->offset = ((uint32_t)trans->out[0] << 16) | + ((uint32_t)trans->out[1] << 8) | + ((uint32_t)trans->out[2] << 0); + spi_use_out(trans, 3); + return 1; + default: + printf("Unrecognized SPI transaction type %#x\n", trans->type); + return -1; + } +} + +/* + * Wait for up to 6s til status register bit(s) turn 1 (in case wait_til_set + * below is True) or 0. In case the wait was for the bit(s) to set - write + * those bits back, which would cause resetting them. + * + * Return the last read status value on success or -1 on failure. + */ +static int ich_status_poll(u16 bitmask, int wait_til_set) +{ + int timeout = 600000; /* This will result in 6s */ + u16 status = 0; + + while (timeout--) { + status = ich_readw(ctlr.status); + if (wait_til_set ^ ((status & bitmask) == 0)) { + if (wait_til_set) + ich_writew((status & bitmask), ctlr.status); + return status; + } + udelay(10); + } + + printf("ICH SPI: SCIP timeout, read %x, expected %x\n", + status, bitmask); + return -1; +} + +/* +int spi_xfer(struct spi_slave *slave, const void *dout, + unsigned int bitsout, void *din, unsigned int bitsin) +*/ +int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout, + void *din, unsigned long flags) +{ + struct ich_spi_slave *ich = to_ich_spi(slave); + uint16_t control; + int16_t opcode_index; + int with_address; + int status; + int bytes = bitlen / 8; + struct spi_trans *trans = &ich->trans; + unsigned type = flags & (SPI_XFER_BEGIN | SPI_XFER_END); + int using_cmd = 0; + /* Align read transactions to 64-byte boundaries */ + char buff[ctlr.databytes]; + + /* Ee don't support writing partial bytes. */ + if (bitlen % 8) { + debug("ICH SPI: Accessing partial bytes not supported\n"); + return -1; + } + + /* An empty end transaction can be ignored */ + if (type == SPI_XFER_END && !dout && !din) + return 0; + + if (type & SPI_XFER_BEGIN) + memset(trans, '\0', sizeof(*trans)); + + /* Dp we need to come back later to finish it? */ + if (dout && type == SPI_XFER_BEGIN) { + if (bytes > ICH_MAX_CMD_LEN) { + debug("ICH SPI: Command length limit exceeded\n"); + return -1; + } + memcpy(trans->cmd, dout, bytes); + trans->cmd_len = bytes; + debug("ICH SPI: Saved %d bytes\n", bytes); + return 0; + } + + /* + * We process a 'middle' spi_xfer() call, which has no + * SPI_XFER_BEGIN/END, as an independent transaction as if it had + * an end. We therefore repeat the command. This is because ICH + * seems to have no support for this, or because interest (in digging + * out the details and creating a special case in the code) is low. + */ + if (trans->cmd_len) { + trans->out = trans->cmd; + trans->bytesout = trans->cmd_len; + using_cmd = 1; + debug("ICH SPI: Using %d bytes\n", trans->cmd_len); + } else { + trans->out = dout; + trans->bytesout = dout ? bytes : 0; + } + + trans->in = din; + trans->bytesin = din ? bytes : 0; + + /* There has to always at least be an opcode. */ + if (!trans->bytesout) { + debug("ICH SPI: No opcode for transfer\n"); + return -1; + } + + if (ich_status_poll(SPIS_SCIP, 0) == -1) + return -1; + + ich_writew(SPIS_CDS | SPIS_FCERR, ctlr.status); + + spi_setup_type(trans, using_cmd ? bytes : 0); + opcode_index = spi_setup_opcode(trans); + if (opcode_index < 0) + return -1; + with_address = spi_setup_offset(trans); + if (with_address < 0) + return -1; + + if (trans->opcode == SPI_OPCODE_WREN) { + /* + * Treat Write Enable as Atomic Pre-Op if possible + * in order to prevent the Management Engine from + * issuing a transaction between WREN and DATA. + */ + if (!ctlr.ichspi_lock) + ich_writew(trans->opcode, ctlr.preop); + return 0; + } + + if (ctlr.speed && ctlr.max_speed >= 33000000) { + int byte; + + byte = ich_readb(ctlr.speed); + if (ich->speed >= 33000000) + byte |= SSFC_SCF_33MHZ; + else + byte &= ~SSFC_SCF_33MHZ; + ich_writeb(byte, ctlr.speed); + } + + /* See if we have used up the command data */ + if (using_cmd && dout && bytes) { + trans->out = dout; + trans->bytesout = bytes; + debug("ICH SPI: Moving to data, %d bytes\n", bytes); + } + + /* Preset control fields */ + control = ich_readw(ctlr.control); + control &= ~SSFC_RESERVED; + control = SPIC_SCGO | ((opcode_index & 0x07) << 4); + + /* Issue atomic preop cycle if needed */ + if (ich_readw(ctlr.preop)) + control |= SPIC_ACS; + + if (!trans->bytesout && !trans->bytesin) { + /* SPI addresses are 24 bit only */ + if (with_address) + ich_writel(trans->offset & 0x00FFFFFF, ctlr.addr); + + /* + * This is a 'no data' command (like Write Enable), its + * bitesout size was 1, decremented to zero while executing + * spi_setup_opcode() above. Tell the chip to send the + * command. + */ + ich_writew(control, ctlr.control); + + /* wait for the result */ + status = ich_status_poll(SPIS_CDS | SPIS_FCERR, 1); + if (status == -1) + return -1; + + if (status & SPIS_FCERR) { + debug("ICH SPI: Command transaction error\n"); + return -1; + } + + return 0; + } + + /* + * Check if this is a write command atempting to transfer more bytes + * than the controller can handle. Iterations for writes are not + * supported here because each SPI write command needs to be preceded + * and followed by other SPI commands, and this sequence is controlled + * by the SPI chip driver. + */ + if (trans->bytesout > ctlr.databytes) { + debug("ICH SPI: Too much to write. This should be prevented by the driver's max_write_size?\n"); + return -1; + } + + /* + * Read or write up to databytes bytes at a time until everything has + * been sent. + */ + while (trans->bytesout || trans->bytesin) { + uint32_t data_length; + uint32_t aligned_offset; + uint32_t diff; + + aligned_offset = trans->offset & ~(ctlr.databytes - 1); + diff = trans->offset - aligned_offset; + + /* SPI addresses are 24 bit only */ + ich_writel(aligned_offset & 0x00FFFFFF, ctlr.addr); + + if (trans->bytesout) + data_length = min(trans->bytesout, ctlr.databytes); + else + data_length = min(trans->bytesin, ctlr.databytes); + + /* Program data into FDATA0 to N */ + if (trans->bytesout) { + write_reg(trans->out, ctlr.data, data_length); + spi_use_out(trans, data_length); + if (with_address) + trans->offset += data_length; + } + + /* Add proper control fields' values */ + control &= ~((ctlr.databytes - 1) << 8); + control |= SPIC_DS; + control |= (data_length - 1) << 8; + + /* write it */ + ich_writew(control, ctlr.control); + + /* Wait for Cycle Done Status or Flash Cycle Error. */ + status = ich_status_poll(SPIS_CDS | SPIS_FCERR, 1); + if (status == -1) + return -1; + + if (status & SPIS_FCERR) { + debug("ICH SPI: Data transaction error\n"); + return -1; + } + + if (trans->bytesin) { + if (diff) { + data_length -= diff; + read_reg(ctlr.data, buff, ctlr.databytes); + memcpy(trans->in, buff + diff, data_length); + } else { + read_reg(ctlr.data, trans->in, data_length); + } + spi_use_in(trans, data_length); + if (with_address) + trans->offset += data_length; + } + } + + /* Clear atomic preop now that xfer is done */ + ich_writew(0, ctlr.preop); + + return 0; +} + + +/* + * This uses the SPI controller from the Intel Cougar Point and Panther Point + * PCH to write-protect portions of the SPI flash until reboot. The changes + * don't actually take effect until the HSFS[FLOCKDN] bit is set, but that's + * done elsewhere. + */ +int spi_write_protect_region(uint32_t lower_limit, uint32_t length, int hint) +{ + uint32_t tmplong; + uint32_t upper_limit; + + if (!ctlr.pr) { + printf("%s: operation not supported on this chipset\n", + __func__); + return -1; + } + + if (length == 0 || + lower_limit > (0xFFFFFFFFUL - length) + 1 || + hint < 0 || hint > 4) { + printf("%s(0x%x, 0x%x, %d): invalid args\n", __func__, + lower_limit, length, hint); + return -1; + } + + upper_limit = lower_limit + length - 1; + + /* + * Determine bits to write, as follows: + * 31 Write-protection enable (includes erase operation) + * 30:29 reserved + * 28:16 Upper Limit (FLA address bits 24:12, with 11:0 == 0xfff) + * 15 Read-protection enable + * 14:13 reserved + * 12:0 Lower Limit (FLA address bits 24:12, with 11:0 == 0x000) + */ + tmplong = 0x80000000 | + ((upper_limit & 0x01fff000) << 4) | + ((lower_limit & 0x01fff000) >> 12); + + printf("%s: writing 0x%08x to %p\n", __func__, tmplong, + &ctlr.pr[hint]); + ctlr.pr[hint] = tmplong; + + return 0; +} diff --git a/drivers/spi/ich.h b/drivers/spi/ich.h new file mode 100644 index 000000000..bd7bc12c6 --- /dev/null +++ b/drivers/spi/ich.h @@ -0,0 +1,143 @@ +/* + * Copyright (c) 2011 The Chromium OS Authors. + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but without any warranty; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + * + * This file is derived from the flashrom project. + */ + +struct ich7_spi_regs { + uint16_t spis; + uint16_t spic; + uint32_t spia; + uint64_t spid[8]; + uint64_t _pad; + uint32_t bbar; + uint16_t preop; + uint16_t optype; + uint8_t opmenu[8]; +} __packed; + +struct ich9_spi_regs { + uint32_t bfpr; /* 0x00 */ + uint16_t hsfs; + uint16_t hsfc; + uint32_t faddr; + uint32_t _reserved0; + uint32_t fdata[16]; /* 0x10 */ + uint32_t frap; /* 0x50 */ + uint32_t freg[5]; + uint32_t _reserved1[3]; + uint32_t pr[5]; /* 0x74 */ + uint32_t _reserved2[2]; + uint8_t ssfs; /* 0x90 */ + uint8_t ssfc[3]; + uint16_t preop; /* 0x94 */ + uint16_t optype; + uint8_t opmenu[8]; /* 0x98 */ + uint32_t bbar; + uint8_t _reserved3[12]; + uint32_t fdoc; + uint32_t fdod; + uint8_t _reserved4[8]; + uint32_t afc; + uint32_t lvscc; + uint32_t uvscc; + uint8_t _reserved5[4]; + uint32_t fpb; + uint8_t _reserved6[28]; + uint32_t srdl; + uint32_t srdc; + uint32_t srd; +} __packed; + +enum { + SPIS_SCIP = 0x0001, + SPIS_GRANT = 0x0002, + SPIS_CDS = 0x0004, + SPIS_FCERR = 0x0008, + SSFS_AEL = 0x0010, + SPIS_LOCK = 0x8000, + SPIS_RESERVED_MASK = 0x7ff0, + SSFS_RESERVED_MASK = 0x7fe2 +}; + +enum { + SPIC_SCGO = 0x000002, + SPIC_ACS = 0x000004, + SPIC_SPOP = 0x000008, + SPIC_DBC = 0x003f00, + SPIC_DS = 0x004000, + SPIC_SME = 0x008000, + SSFC_SCF_MASK = 0x070000, + SSFC_RESERVED = 0xf80000, + + /* Mask for speed byte, biuts 23:16 of SSFC */ + SSFC_SCF_33MHZ = 0x01, +}; + +enum { + HSFS_FDONE = 0x0001, + HSFS_FCERR = 0x0002, + HSFS_AEL = 0x0004, + HSFS_BERASE_MASK = 0x0018, + HSFS_BERASE_SHIFT = 3, + HSFS_SCIP = 0x0020, + HSFS_FDOPSS = 0x2000, + HSFS_FDV = 0x4000, + HSFS_FLOCKDN = 0x8000 +}; + +enum { + HSFC_FGO = 0x0001, + HSFC_FCYCLE_MASK = 0x0006, + HSFC_FCYCLE_SHIFT = 1, + HSFC_FDBC_MASK = 0x3f00, + HSFC_FDBC_SHIFT = 8, + HSFC_FSMIE = 0x8000 +}; + +enum { + SPI_OPCODE_TYPE_READ_NO_ADDRESS = 0, + SPI_OPCODE_TYPE_WRITE_NO_ADDRESS = 1, + SPI_OPCODE_TYPE_READ_WITH_ADDRESS = 2, + SPI_OPCODE_TYPE_WRITE_WITH_ADDRESS = 3 +}; + +enum { + ICH_MAX_CMD_LEN = 5, +}; + +struct spi_trans { + uint8_t cmd[ICH_MAX_CMD_LEN]; + int cmd_len; + const uint8_t *out; + uint32_t bytesout; + uint8_t *in; + uint32_t bytesin; + uint8_t type; + uint8_t opcode; + uint32_t offset; +}; + +struct ich_spi_slave { + struct spi_slave slave; + struct spi_trans trans; /* current transaction in progress */ + int speed; /* SPI speed in Hz */ +}; |