X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=drivers%2Fspi%2Fkirkwood_spi.c;h=e7b0982fb654681e4b9650d7ce8fe9a9c23d8acd;hb=8968b914be7bfd67d179d0395898bd9db67aaad1;hp=a1c307059c3ee5993630eca3fb446c246ebdb584;hpb=5710de45808eb8f1cc34b51dc3e67e2422113249;p=u-boot diff --git a/drivers/spi/kirkwood_spi.c b/drivers/spi/kirkwood_spi.c index a1c307059c..e7b0982fb6 100644 --- a/drivers/spi/kirkwood_spi.c +++ b/drivers/spi/kirkwood_spi.c @@ -5,93 +5,128 @@ * * Derived from drivers/spi/mpc8xxx_spi.c * - * 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., 51 Franklin Street, Fifth Floor, Boston, - * MA 02110-1301 USA + * SPDX-License-Identifier: GPL-2.0+ */ #include #include #include -#include -#include +#include +#include +#ifdef CONFIG_KIRKWOOD #include +#endif +#include -static struct kwspi_registers *spireg = (struct kwspi_registers *)KW_SPI_BASE; +static struct kwspi_registers *spireg = + (struct kwspi_registers *)MVEBU_SPI_BASE; + +#ifdef CONFIG_KIRKWOOD +static u32 cs_spi_mpp_back[2]; +#endif 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; - u32 kwspi_mpp_config[] = { - MPP0_GPIO, - MPP7_SPI_SCn, - 0 +#ifdef CONFIG_KIRKWOOD + static const u32 kwspi_mpp_config[2][2] = { + { MPP0_SPI_SCn, 0 }, /* if cs == 0 */ + { MPP7_SPI_SCn, 0 } /* if cs != 0 */ }; +#endif if (!spi_cs_is_valid(bus, cs)) return NULL; - slave = malloc(sizeof(struct spi_slave)); + slave = spi_alloc_slave_base(bus, cs); if (!slave) return NULL; - slave->bus = bus; - slave->cs = cs; - - writel(~KWSPI_CSN_ACT | KWSPI_SMEMRDY, &spireg->ctrl); + writel(KWSPI_SMEMRDY, &spireg->ctrl); /* calculate spi clock prescaller using max_hz */ - data = ((CONFIG_SYS_TCLK / 2) / max_hz) & KWSPI_CLKPRESCL_MASK; - data |= 0x10; + 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); + debug("data = 0x%08x\n", data); writel(KWSPI_SMEMRDIRQ, &spireg->irq_cause); - writel(KWSPI_IRQMASK, spireg->irq_mask); + writel(KWSPI_IRQMASK, &spireg->irq_mask); +#ifdef CONFIG_KIRKWOOD /* program mpp registers to select SPI_CSn */ - if (cs) { - kwspi_mpp_config[0] = MPP0_GPIO; - kwspi_mpp_config[1] = MPP7_SPI_SCn; - } else { - kwspi_mpp_config[0] = MPP0_SPI_SCn; - kwspi_mpp_config[1] = MPP7_GPO; - } - kirkwood_mpp_conf(kwspi_mpp_config); + kirkwood_mpp_conf(kwspi_mpp_config[cs ? 1 : 0], cs_spi_mpp_back); +#endif return slave; } void spi_free_slave(struct spi_slave *slave) { +#ifdef CONFIG_KIRKWOOD + kirkwood_mpp_conf(cs_spi_mpp_back, NULL); +#endif free(slave); } -int spi_claim_bus(struct spi_slave *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 @@ -102,18 +137,22 @@ void spi_release_bus(struct spi_slave *slave) */ int spi_cs_is_valid(unsigned int bus, unsigned int cs) { - return (bus == 0 && (cs == 0 || cs == 1)); + 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); + setbits_le32(&spireg->ctrl, KWSPI_CSN_ACT); } void spi_cs_deactivate(struct spi_slave *slave) { - writel(readl(&spireg->ctrl) & KWSPI_IRQMASK, &spireg->ctrl); + clrbits_le32(&spireg->ctrl, KWSPI_CSN_ACT); } int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout, @@ -122,7 +161,7 @@ int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout, unsigned int tmpdout, tmpdin; int tm, isread = 0; - debug("spi_xfer: slave %u:%u dout %08X din %08X bitlen %u\n", + 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) @@ -132,8 +171,7 @@ int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout, * 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); + clrsetbits_le32(&spireg->cfg, KWSPI_XFERLEN_MASK, KWSPI_XFERLEN_1BYTE); while (bitlen > 4) { debug("loopstart bitlen %d\n", bitlen); @@ -141,9 +179,9 @@ int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout, /* Shift data so it's msb-justified */ if (dout) - tmpdout = *(u32 *) dout & 0x0ff; + tmpdout = *(u32 *)dout & 0xff; - writel(~KWSPI_SMEMRDIRQ, &spireg->irq_cause); + clrbits_le32(&spireg->irq_cause, KWSPI_SMEMRDIRQ); writel(tmpdout, &spireg->dout); /* Write the data out */ debug("*** spi_xfer: ... %08x written, bitlen %d\n", tmpdout, bitlen); @@ -157,12 +195,11 @@ int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout, if (readl(&spireg->irq_cause) & KWSPI_SMEMRDIRQ) { isread = 1; tmpdin = readl(&spireg->din); - debug - ("spi_xfer: din %08x..%08x read\n", - din, tmpdin); + debug("spi_xfer: din %p..%08x read\n", + din, tmpdin); if (din) { - *((u8 *) din) = (u8) tmpdin; + *((u8 *)din) = (u8)tmpdin; din += 1; } if (dout)