diff options
Diffstat (limited to 'qemu/roms/u-boot/drivers/spi/kirkwood_spi.c')
| -rw-r--r-- | qemu/roms/u-boot/drivers/spi/kirkwood_spi.c | 214 |
1 files changed, 0 insertions, 214 deletions
diff --git a/qemu/roms/u-boot/drivers/spi/kirkwood_spi.c b/qemu/roms/u-boot/drivers/spi/kirkwood_spi.c deleted file mode 100644 index 942a208c2..000000000 --- a/qemu/roms/u-boot/drivers/spi/kirkwood_spi.c +++ /dev/null @@ -1,214 +0,0 @@ -/* - * (C) Copyright 2009 - * Marvell Semiconductor <www.marvell.com> - * Written-by: Prafulla Wadaskar <prafulla@marvell.com> - * - * Derived from drivers/spi/mpc8xxx_spi.c - * - * SPDX-License-Identifier: GPL-2.0+ - */ - -#include <common.h> -#include <malloc.h> -#include <spi.h> -#include <asm/io.h> -#include <asm/arch/kirkwood.h> -#include <asm/arch/spi.h> -#include <asm/arch/mpp.h> - -static struct kwspi_registers *spireg = (struct kwspi_registers *)KW_SPI_BASE; - -u32 cs_spi_mpp_back[2]; - -struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs, - unsigned int max_hz, unsigned int mode) -{ - struct spi_slave *slave; - u32 data; - static const u32 kwspi_mpp_config[2][2] = { - { MPP0_SPI_SCn, 0 }, /* if cs == 0 */ - { MPP7_SPI_SCn, 0 } /* if cs != 0 */ - }; - - if (!spi_cs_is_valid(bus, cs)) - return NULL; - - slave = spi_alloc_slave_base(bus, cs); - if (!slave) - return NULL; - - writel(~KWSPI_CSN_ACT | KWSPI_SMEMRDY, &spireg->ctrl); - - /* calculate spi clock prescaller using max_hz */ - data = ((CONFIG_SYS_TCLK / 2) / max_hz) + 0x10; - data = data < KWSPI_CLKPRESCL_MIN ? KWSPI_CLKPRESCL_MIN : data; - data = data > KWSPI_CLKPRESCL_MASK ? KWSPI_CLKPRESCL_MASK : data; - - /* program spi clock prescaller using max_hz */ - writel(KWSPI_ADRLEN_3BYTE | data, &spireg->cfg); - debug("data = 0x%08x \n", data); - - writel(KWSPI_SMEMRDIRQ, &spireg->irq_cause); - writel(KWSPI_IRQMASK, &spireg->irq_mask); - - /* program mpp registers to select SPI_CSn */ - kirkwood_mpp_conf(kwspi_mpp_config[cs ? 1 : 0], cs_spi_mpp_back); - - return slave; -} - -void spi_free_slave(struct spi_slave *slave) -{ - kirkwood_mpp_conf(cs_spi_mpp_back, NULL); - free(slave); -} - -#if defined(CONFIG_SYS_KW_SPI_MPP) -u32 spi_mpp_backup[4]; -#endif - -__attribute__((weak)) int board_spi_claim_bus(struct spi_slave *slave) -{ - return 0; -} - -int spi_claim_bus(struct spi_slave *slave) -{ -#if defined(CONFIG_SYS_KW_SPI_MPP) - u32 config; - u32 spi_mpp_config[4]; - - config = CONFIG_SYS_KW_SPI_MPP; - - if (config & MOSI_MPP6) - spi_mpp_config[0] = MPP6_SPI_MOSI; - else - spi_mpp_config[0] = MPP1_SPI_MOSI; - - if (config & SCK_MPP10) - spi_mpp_config[1] = MPP10_SPI_SCK; - else - spi_mpp_config[1] = MPP2_SPI_SCK; - - if (config & MISO_MPP11) - spi_mpp_config[2] = MPP11_SPI_MISO; - else - spi_mpp_config[2] = MPP3_SPI_MISO; - - spi_mpp_config[3] = 0; - spi_mpp_backup[3] = 0; - - /* set new spi mpp and save current mpp config */ - kirkwood_mpp_conf(spi_mpp_config, spi_mpp_backup); - -#endif - - return board_spi_claim_bus(slave); -} - -__attribute__((weak)) void board_spi_release_bus(struct spi_slave *slave) -{ -} - -void spi_release_bus(struct spi_slave *slave) -{ -#if defined(CONFIG_SYS_KW_SPI_MPP) - kirkwood_mpp_conf(spi_mpp_backup, NULL); -#endif - - board_spi_release_bus(slave); -} - -#ifndef CONFIG_SPI_CS_IS_VALID -/* - * you can define this function board specific - * define above CONFIG in board specific config file and - * provide the function in board specific src file - */ -int spi_cs_is_valid(unsigned int bus, unsigned int cs) -{ - return (bus == 0 && (cs == 0 || cs == 1)); -} -#endif - -void spi_init(void) -{ -} - -void spi_cs_activate(struct spi_slave *slave) -{ - writel(readl(&spireg->ctrl) | KWSPI_IRQUNMASK, &spireg->ctrl); -} - -void spi_cs_deactivate(struct spi_slave *slave) -{ - writel(readl(&spireg->ctrl) & KWSPI_IRQMASK, &spireg->ctrl); -} - -int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout, - void *din, unsigned long flags) -{ - unsigned int tmpdout, tmpdin; - int tm, isread = 0; - - debug("spi_xfer: slave %u:%u dout %p din %p bitlen %u\n", - slave->bus, slave->cs, dout, din, bitlen); - - if (flags & SPI_XFER_BEGIN) - spi_cs_activate(slave); - - /* - * handle data in 8-bit chunks - * TBD: 2byte xfer mode to be enabled - */ - writel(((readl(&spireg->cfg) & ~KWSPI_XFERLEN_MASK) | - KWSPI_XFERLEN_1BYTE), &spireg->cfg); - - while (bitlen > 4) { - debug("loopstart bitlen %d\n", bitlen); - tmpdout = 0; - - /* Shift data so it's msb-justified */ - if (dout) - tmpdout = *(u32 *) dout & 0x0ff; - - writel(~KWSPI_SMEMRDIRQ, &spireg->irq_cause); - writel(tmpdout, &spireg->dout); /* Write the data out */ - debug("*** spi_xfer: ... %08x written, bitlen %d\n", - tmpdout, bitlen); - - /* - * Wait for SPI transmit to get out - * or time out (1 second = 1000 ms) - * The NE event must be read and cleared first - */ - for (tm = 0, isread = 0; tm < KWSPI_TIMEOUT; ++tm) { - if (readl(&spireg->irq_cause) & KWSPI_SMEMRDIRQ) { - isread = 1; - tmpdin = readl(&spireg->din); - debug - ("spi_xfer: din %p..%08x read\n", - din, tmpdin); - - if (din) { - *((u8 *) din) = (u8) tmpdin; - din += 1; - } - if (dout) - dout += 1; - bitlen -= 8; - } - if (isread) - break; - } - if (tm >= KWSPI_TIMEOUT) - printf("*** spi_xfer: Time out during SPI transfer\n"); - - debug("loopend bitlen %d\n", bitlen); - } - - if (flags & SPI_XFER_END) - spi_cs_deactivate(slave); - - return 0; -} |