diff options
Diffstat (limited to 'qemu/roms/u-boot/drivers/spi/ich.c')
-rw-r--r-- | qemu/roms/u-boot/drivers/spi/ich.c | 741 |
1 files changed, 0 insertions, 741 deletions
diff --git a/qemu/roms/u-boot/drivers/spi/ich.c b/qemu/roms/u-boot/drivers/spi/ich.c deleted file mode 100644 index f5c6f3e7d..000000000 --- a/qemu/roms/u-boot/drivers/spi/ich.c +++ /dev/null @@ -1,741 +0,0 @@ -/* - * Copyright (c) 2011-12 The Chromium OS Authors. - * - * SPDX-License-Identifier: GPL-2.0+ - * - * 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; - } - - /* - * Yes this controller can only write a small number of bytes at - * once! The limit is typically 64 bytes. - */ - ich->slave.max_write_size = ctlr.databytes; - 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; -} |