diff options
Diffstat (limited to 'src/soc')
| -rw-r--r-- | src/soc/rockchip/rk3288/Makefile.inc | 3 | ||||
| -rwxr-xr-x | src/soc/rockchip/rk3288/clock.c | 101 | ||||
| -rwxr-xr-x | src/soc/rockchip/rk3288/clock.h | 7 | ||||
| -rw-r--r-- | src/soc/rockchip/rk3288/cpu.h | 4 | ||||
| -rwxr-xr-x | src/soc/rockchip/rk3288/spi.c | 318 | ||||
| -rwxr-xr-x | src/soc/rockchip/rk3288/spi.h | 204 |
6 files changed, 593 insertions, 44 deletions
diff --git a/src/soc/rockchip/rk3288/Makefile.inc b/src/soc/rockchip/rk3288/Makefile.inc index 13c811475b..05003a210d 100644 --- a/src/soc/rockchip/rk3288/Makefile.inc +++ b/src/soc/rockchip/rk3288/Makefile.inc @@ -26,6 +26,7 @@ ifeq ($(CONFIG_BOOTBLOCK_CONSOLE),y) bootblock-$(CONFIG_DRIVERS_UART) += uart.c endif bootblock-y += clock.c +bootblock-y += spi.c romstage-y += cbmem.c romstage-y += timer.c @@ -33,10 +34,12 @@ romstage-y += monotonic_timer.c romstage-y += media.c romstage-$(CONFIG_DRIVERS_UART) += uart.c romstage-y += clock.c +romstage-y += spi.c ramstage-y += cbmem.c ramstage-y += timer.c ramstage-y += monotonic_timer.c ramstage-y += clock.c +ramstage-y += spi.c ramstage-y += media.c ramstage-$(CONFIG_DRIVERS_UART) += uart.c diff --git a/src/soc/rockchip/rk3288/clock.c b/src/soc/rockchip/rk3288/clock.c index 3087a1377f..757d180387 100755 --- a/src/soc/rockchip/rk3288/clock.c +++ b/src/soc/rockchip/rk3288/clock.c @@ -64,11 +64,17 @@ check_member(rk3288_cru_reg, cru_emmc_con[1], 0x021c); static struct rk3288_cru_reg * const cru_ptr = (void *)CRU_BASE; +#define PLL_DIVISORS(hz, _nr, _no) {\ + .nr = _nr, .nf = (u32)((u64)hz * _nr * _no / 24000000), .no = _no};\ + _Static_assert(((u64)hz * _nr * _no / 24000000) * 24000000 /\ + (_nr * _no) == hz,\ + #hz "Hz cannot be hit with PLL divisors in " __FILE__); + /* apll = 816MHz, gpll = 594MHz, cpll = 384MHz, dpll = 300MHz */ -static const struct pll_div apll_init_cfg = {.nr = 1, .nf = 68, .no = 2}; -static const struct pll_div gpll_init_cfg = {.nr = 2, .nf = 198, .no = 4}; -static const struct pll_div cpll_init_cfg = {.nr = 2, .nf = 128, .no = 4}; -static const struct pll_div dpll_init_cfg = {.nr = 1, .nf = 50, .no = 4}; +static const struct pll_div apll_init_cfg = PLL_DIVISORS(APLL_HZ, 1, 2); +static const struct pll_div gpll_init_cfg = PLL_DIVISORS(GPLL_HZ, 2, 4); +static const struct pll_div cpll_init_cfg = PLL_DIVISORS(CPLL_HZ, 2, 4); +static const struct pll_div dpll_init_cfg = PLL_DIVISORS(DPLL_HZ, 1, 4); /*******************PLL CON0 BITS***************************/ #define PLL_OD_MSK (0x0F) @@ -161,21 +167,21 @@ static const struct pll_div dpll_init_cfg = {.nr = 1, .nf = 50, .no = 4}; static int rkclk_set_pll(u32 *pll_con, const struct pll_div *pll_div_cfg) { /* enter rest */ - writel(RK_SETBITS(PLL_RESET, PLL_RESET_MSK), &pll_con[3]); + writel(RK_SETBITS(PLL_RESET_MSK), &pll_con[3]); - writel(RK_SETBITS((pll_div_cfg->nr - 1) << PLL_NR_SHIFT, PLL_NR_MSK) - | RK_SETBITS((pll_div_cfg->no - 1), PLL_OD_MSK), &pll_con[0]); + writel(RK_CLRSETBITS(PLL_NR_MSK, (pll_div_cfg->nr - 1) << PLL_NR_SHIFT) + | RK_CLRSETBITS(PLL_OD_MSK, (pll_div_cfg->no - 1)), &pll_con[0]); - writel(RK_SETBITS((pll_div_cfg->nf - 1), PLL_NF_MSK), + writel(RK_CLRSETBITS(PLL_NF_MSK, (pll_div_cfg->nf - 1)), &pll_con[1]); - writel(RK_SETBITS(((pll_div_cfg->nf >> 1) - 1), PLL_BWADJ_MSK), + writel(RK_CLRSETBITS(PLL_BWADJ_MSK, ((pll_div_cfg->nf >> 1) - 1)), &pll_con[2]); udelay(10); /* return form rest */ - writel(RK_SETBITS(PLL_RESET_RESUME, PLL_RESET_MSK), &pll_con[3]); + writel(RK_CLRBITS(PLL_RESET_MSK), &pll_con[3]); return 0; } @@ -183,10 +189,10 @@ static int rkclk_set_pll(u32 *pll_con, const struct pll_div *pll_div_cfg) void rkclk_init(void) { /* pll enter slow-mode */ - writel(RK_SETBITS(APLL_MODE_SLOW, APLL_MODE_MSK) - | RK_SETBITS(GPLL_MODE_SLOW, GPLL_MODE_MSK) - | RK_SETBITS(CPLL_MODE_SLOW, CPLL_MODE_MSK) - | RK_SETBITS(DPLL_MODE_SLOW, DPLL_MODE_MSK), + writel(RK_CLRSETBITS(APLL_MODE_MSK, APLL_MODE_SLOW) + | RK_CLRSETBITS(GPLL_MODE_MSK, GPLL_MODE_SLOW) + | RK_CLRSETBITS(CPLL_MODE_MSK, CPLL_MODE_SLOW) + | RK_CLRSETBITS(DPLL_MODE_MSK, DPLL_MODE_SLOW), &cru_ptr->cru_mode_con); /* init pll */ @@ -212,19 +218,19 @@ void rkclk_init(void) * core clock select apll, apll clk = 816MHz * arm clk = 816MHz, mpclk = 204MHz, m0clk = 408MHz */ - writel(RK_SETBITS(CORE_SEL_APLL, CORE_SEL_PLL_MSK) - | RK_SETBITS(0 << A12_DIV_SHIFT, A12_DIV_MSK) - | RK_SETBITS(3 << MP_DIV_SHIFT, MP_DIV_MSK) - | RK_SETBITS(1, M0_DIV_MSK), + writel(RK_CLRBITS(CORE_SEL_PLL_MSK) + | RK_CLRSETBITS(A12_DIV_MSK, 0 << A12_DIV_SHIFT) + | RK_CLRSETBITS(MP_DIV_MSK, 3 << MP_DIV_SHIFT) + | RK_CLRSETBITS(M0_DIV_MSK, 1 << 0), &cru_ptr->cru_clksel_con[0]); /* * set up dependent divisors for L2RAM/ATCLK and PCLK clocks. * l2ramclk = 408MHz, atclk = 204MHz, pclk_dbg = 204MHz */ - writel(RK_SETBITS(1, L2_DIV_MSK) - | RK_SETBITS((3 << ATCLK_DIV_SHIFT), ATCLK_DIV_MSK) - | RK_SETBITS((3 << PCLK_DBG_DIV_SHIFT), PCLK_DBG_DIV_MSK), + writel(RK_CLRSETBITS(L2_DIV_MSK, 1 << 0) + | RK_CLRSETBITS(ATCLK_DIV_MSK, (3 << ATCLK_DIV_SHIFT)) + | RK_CLRSETBITS(PCLK_DBG_DIV_MSK, (3 << PCLK_DBG_DIV_SHIFT)), &cru_ptr->cru_clksel_con[37]); /* @@ -233,33 +239,44 @@ void rkclk_init(void) * peri clock select gpll, gpll clk = 594MHz * aclk = 148.5MHz, hclk = 148.5Mhz, pclk = 74.25MHz */ - writel(RK_SETBITS(PERI_SEL_GPLL, PERI_SEL_PLL_MSK) - | RK_SETBITS(1 << PERI_PCLK_DIV_SHIFT, PERI_PCLK_DIV_MSK) - | RK_SETBITS(0 << PERI_HCLK_DIV_SHIFT, PERI_HCLK_DIV_MSK) - | RK_SETBITS(3, PERI_ACLK_DIV_MSK), + writel(RK_SETBITS(PERI_SEL_PLL_MSK) + | RK_CLRSETBITS(PERI_PCLK_DIV_MSK, 1 << PERI_PCLK_DIV_SHIFT) + | RK_CLRSETBITS(PERI_HCLK_DIV_MSK, 0 << PERI_HCLK_DIV_SHIFT) + | RK_CLRSETBITS(PERI_ACLK_DIV_MSK, 3 << 0), &cru_ptr->cru_clksel_con[10]); /* PLL enter normal-mode */ - writel(RK_SETBITS(APLL_MODE_NORM, APLL_MODE_MSK) - | RK_SETBITS(GPLL_MODE_NORM, GPLL_MODE_MSK) - | RK_SETBITS(CPLL_MODE_NORM, CPLL_MODE_MSK) - | RK_SETBITS(DPLL_MODE_NORM, DPLL_MODE_MSK), + writel(RK_CLRSETBITS(APLL_MODE_MSK, APLL_MODE_NORM) + | RK_CLRSETBITS(GPLL_MODE_MSK, GPLL_MODE_NORM) + | RK_CLRSETBITS(CPLL_MODE_MSK, CPLL_MODE_NORM) + | RK_CLRSETBITS(DPLL_MODE_MSK, DPLL_MODE_NORM), &cru_ptr->cru_mode_con); } -void rkclk_ddr_reset(u32 ch, u32 ctl, u32 phy) +void rkclk_configure_spi(unsigned int bus, unsigned int hz) { - u32 phy_ctl_srstn_shift = 4 + 5 * ch; - u32 ctl_psrstn_shift = 3 + 5 * ch; - u32 ctl_srstn_shift = 2 + 5 * ch; - u32 phy_psrstn_shift = 1 + 5 * ch; - u32 phy_srstn_shift = 5 * ch; - - writel(RK_SETBITS(phy << phy_ctl_srstn_shift, 1 << phy_ctl_srstn_shift) - | RK_SETBITS(ctl << ctl_psrstn_shift, 1 << ctl_psrstn_shift) - | RK_SETBITS(ctl << ctl_srstn_shift, 1 << ctl_srstn_shift) - | RK_SETBITS(phy << phy_psrstn_shift, 1 << phy_psrstn_shift) - | RK_SETBITS(phy << phy_srstn_shift, 1 << phy_srstn_shift), - &cru_ptr->cru_softrst_con[10]); + int src_clk_div = GPLL_HZ / hz; + + assert((src_clk_div - 1 < 127) && (src_clk_div * hz == GPLL_HZ)); + + switch (bus) { /*select gpll as spi src clk, and set div*/ + case 0: + writel(RK_CLRSETBITS(1 << 7 | 0x1f << 0, 1 << 7 + | (src_clk_div - 1) << 0), + &cru_ptr->cru_clksel_con[25]); + break; + case 1: + writel(RK_CLRSETBITS(1 << 15 | 0x1f << 8, 1 << 15 + | (src_clk_div - 1) << 8), + &cru_ptr->cru_clksel_con[25]); + break; + case 2: + writel(RK_CLRSETBITS(1 << 7 | 0x1f << 0, 1 << 7 + | (src_clk_div - 1) << 0), + &cru_ptr->cru_clksel_con[39]); + break; + default: + printk(BIOS_ERR, "do not support this spi bus\n"); + } } diff --git a/src/soc/rockchip/rk3288/clock.h b/src/soc/rockchip/rk3288/clock.h index cc2ec78d16..e7732199ac 100755 --- a/src/soc/rockchip/rk3288/clock.h +++ b/src/soc/rockchip/rk3288/clock.h @@ -22,8 +22,13 @@ #include "addressmap.h" +#define APLL_HZ 816000000 +#define GPLL_HZ 594000000 +#define CPLL_HZ 384000000 +#define DPLL_HZ 300000000 + void rkclk_init(void); -void rkclk_ddr_reset(u32 ch, u32 ctl, u32 phy); +void rkclk_configure_spi(unsigned int bus, unsigned int hz); #endif /* __SOC_ROCKCHIP_RK3288_CLOCK_H__ */ diff --git a/src/soc/rockchip/rk3288/cpu.h b/src/soc/rockchip/rk3288/cpu.h index ed629c975f..c42bbe8752 100644 --- a/src/soc/rockchip/rk3288/cpu.h +++ b/src/soc/rockchip/rk3288/cpu.h @@ -20,7 +20,9 @@ #ifndef __SOC_ROCKCHIP_RK3288_CPU_H__ #define __SOC_ROCKCHIP_RK3288_CPU_H__ -#define RK_SETBITS(val, msk) (((msk) << 16) | (val)) +#define RK_CLRSETBITS(clr, set) ((((clr) | (set)) << 16) | set) +#define RK_SETBITS(set) RK_CLRSETBITS(0, set) +#define RK_CLRBITS(clr) RK_CLRSETBITS(clr, 0) #endif /* __SOC_ROCKCHIP_RK3288_CPU_H__ */ diff --git a/src/soc/rockchip/rk3288/spi.c b/src/soc/rockchip/rk3288/spi.c new file mode 100755 index 0000000000..396f537a01 --- /dev/null +++ b/src/soc/rockchip/rk3288/spi.c @@ -0,0 +1,318 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 2014 Rockchip Inc. + * + * 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. + * + * 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 St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <console/console.h> +#include <arch/io.h> +#include <stdlib.h> +#include <assert.h> +#include <spi-generic.h> +#include <spi_flash.h> +#include <delay.h> +#include <timer.h> +#include <endian.h> +#include "addressmap.h" +#include "spi.h" +#include "clock.h" + +struct rockchip_spi_slave { + struct spi_slave slave; + struct rockchip_spi *regs; + unsigned int speed_hz; + unsigned int fifo_size; +}; + +#define SPI_TIMEOUT_US 1000 +#define SPI_SRCCLK_HZ 99000000 + +static struct rockchip_spi_slave rockchip_spi_slaves[3] = { + { + .slave = { + .bus = 0, + .rw = SPI_READ_FLAG | SPI_WRITE_FLAG, + }, + .regs = (void *)SPI0_BASE, + .speed_hz = 9000000, + .fifo_size = 32, + }, + { + .slave = {.bus = 1, .rw = SPI_READ_FLAG,}, + .regs = (void *)SPI1_BASE, + .speed_hz = 11000000, + .fifo_size = 32, + }, + { + .slave = { + .bus = 2, + .rw = SPI_READ_FLAG | SPI_WRITE_FLAG, + }, + .regs = (void *)SPI2_BASE, + .speed_hz = 11000000, + .fifo_size = 32, + }, + +}; + +static struct rockchip_spi_slave *to_rockchip_spi(struct spi_slave *slave) +{ + return container_of(slave, struct rockchip_spi_slave, slave); +} + +struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs) +{ + assert(bus >= 0 && bus < 3); + return &(rockchip_spi_slaves[bus].slave); +} + +static void spi_cs_activate(struct spi_slave *slave) +{ + struct rockchip_spi *regs = to_rockchip_spi(slave)->regs; + setbits_le32(®s->ser, 1); +} + +static void spi_cs_deactivate(struct spi_slave *slave) +{ + struct rockchip_spi *regs = to_rockchip_spi(slave)->regs; + clrbits_le32(®s->ser, 1); +} + +static void rockchip_spi_enable_chip(struct rockchip_spi *regs, int enable) +{ + if (enable == 1) + writel(1, ®s->spienr); + else + writel(0, ®s->spienr); +} + +static void rockchip_spi_set_clk(struct rockchip_spi *regs, unsigned int hz) +{ + unsigned short clk_div = 0; + + /* Calculate clock divisor. */ + clk_div = SPI_SRCCLK_HZ / hz; + clk_div = (clk_div + 1) & 0xfffe; + assert((clk_div - 1) * hz == SPI_SRCCLK_HZ); + writel(clk_div, ®s->baudr); +} + +void rockchip_spi_init(unsigned int bus) +{ + struct rockchip_spi_slave *espi = &rockchip_spi_slaves[bus]; + struct rockchip_spi *regs = espi->regs; + unsigned int ctrlr0 = 0; + + rkclk_configure_spi(bus, SPI_SRCCLK_HZ); + rockchip_spi_enable_chip(regs, 0); + rockchip_spi_set_clk(regs, espi->speed_hz); + + /* Operation Mode */ + ctrlr0 = (SPI_OMOD_MASTER << SPI_OMOD_OFFSET); + + /* Data Frame Size */ + ctrlr0 |= SPI_DFS_8BIT << SPI_DFS_OFFSET; + + /* Chip Select Mode */ + ctrlr0 |= (SPI_CSM_KEEP << SPI_CSM_OFFSET); + + /* SSN to Sclk_out delay */ + ctrlr0 |= (SPI_SSN_DELAY_ONE << SPI_SSN_DELAY_OFFSET); + + /* Serial Endian Mode */ + ctrlr0 |= (SPI_SEM_LITTLE << SPI_SEM_OFFSET); + + /* First Bit Mode */ + ctrlr0 |= (SPI_FBM_MSB << SPI_FBM_OFFSET); + + /* Byte and Halfword Transform */ + ctrlr0 |= (SPI_APB_8BIT << SPI_HALF_WORLD_TX_OFFSET); + + /* Rxd Sample Delay */ + ctrlr0 |= (0 << SPI_RXDSD_OFFSET); + + /* Frame Format */ + ctrlr0 |= (SPI_FRF_SPI << SPI_FRF_OFFSET); + + writel(ctrlr0, ®s->ctrlr0); + + /*fifo depth */ + writel(espi->fifo_size / 2 - 1, ®s->txftlr); + writel(espi->fifo_size / 2 - 1, ®s->rxftlr); +} + +int spi_claim_bus(struct spi_slave *slave) +{ + spi_cs_activate(slave); + return 0; +} + +void spi_release_bus(struct spi_slave *slave) +{ + spi_cs_deactivate(slave); +} + +static int rockchip_spi_wait_till_not_busy(struct rockchip_spi *regs) +{ + struct mono_time start; + struct rela_time rt; + timer_monotonic_get(&start); + do { + if (!(readl(®s->sr) & SR_BUSY)) + return 0; + rt = current_time_from(&start); + } while (rela_time_in_microseconds(&rt) < SPI_TIMEOUT_US); + printk(BIOS_DEBUG, + "RK SPI: Status keeps busy for 1000us after a read/write!\n"); + return -1; +} + +int spi_xfer(struct spi_slave *slave, const void *dout, unsigned int sout, + void *din, unsigned int sin) +{ + unsigned int len; + unsigned int bytes_remaining; + uint8_t *p; + struct rockchip_spi *regs = to_rockchip_spi(slave)->regs; + struct rockchip_spi_slave *espi = to_rockchip_spi(slave); + + if (dout) { + len = sout; + p = (uint8_t *) dout; + bytes_remaining = len; + writel(0, ®s->spienr); /*disable spi */ + writel(len - 1, ®s->ctrlr1); /*wrtie len */ + + /*tx only */ + clrsetbits_le32(®s->ctrlr0, SPI_TMOD_MASK << SPI_TMOD_OFFSET, + SPI_TMOD_TO << SPI_TMOD_OFFSET); + writel(1, ®s->spienr);/*enable spi */ + while (bytes_remaining) { + if ((readl(®s->txflr) & 0x3f) + < espi->fifo_size) { + writel(*p++, ®s->txdr); + bytes_remaining--; + } + } + if (rockchip_spi_wait_till_not_busy(regs)) + return -1; + } + if (din) { + len = sin; + p = (uint8_t *) din; + writel(0, ®s->spienr); /*disable spi */ + writel(len - 1, ®s->ctrlr1); /*write len */ + + /*rx only */ + clrsetbits_le32(®s->ctrlr0, SPI_TMOD_MASK << SPI_TMOD_OFFSET, + SPI_TMOD_RO << SPI_TMOD_OFFSET); + while (len) { + writel(0, ®s->spienr);/*disable spi */ + bytes_remaining = MIN(len, 0xffff); + writel(bytes_remaining - 1, ®s->ctrlr1); + len -= bytes_remaining; + writel(1, ®s->spienr);/*enable spi */ + while (bytes_remaining) { + if (readl(®s->rxflr) & 0x3f) { + *p = readl(®s->rxdr) & 0xff; + p += 1; + bytes_remaining--; + } + } + } + if (rockchip_spi_wait_till_not_busy(regs)) + return -1; + } + return 0; +} + +static int rockchip_spi_read(struct spi_slave *slave, void *dest, uint32_t len, + uint32_t off) +{ + unsigned int cmd; + + spi_claim_bus(slave); + cmd = swab32(off) | SF_READ_DATA_CMD; + if (spi_xfer(slave, &cmd, sizeof(cmd), dest, len)) { + printk(BIOS_DEBUG, "rockchip_spi_read err\n"); + spi_release_bus(slave); + return -1; + } + spi_release_bus(slave); + return len; +} + +struct rockchip_spi_media { + struct spi_slave *slave; + struct cbfs_simple_buffer buffer; +}; + +static int rockchip_spi_cbfs_open(struct cbfs_media *media) +{ + return 0; +} + +static int rockchip_spi_cbfs_close(struct cbfs_media *media) +{ + return 0; +} + +static size_t rockchip_spi_cbfs_read(struct cbfs_media *media, void *dest, + size_t offset, size_t count) +{ + struct rockchip_spi_media *spi = + (struct rockchip_spi_media *)media->context; + + return rockchip_spi_read(spi->slave, dest, count, offset); +} + +static void *rockchip_spi_cbfs_map(struct cbfs_media *media, size_t offset, + size_t count) +{ + struct rockchip_spi_media *spi = + (struct rockchip_spi_media *)media->context; + + count = ALIGN_UP(count, 4); + + return cbfs_simple_buffer_map(&spi->buffer, media, offset, count); +} + +static void *rockchip_spi_cbfs_unmap(struct cbfs_media *media, + const void *address) +{ + struct rockchip_spi_media *spi = + (struct rockchip_spi_media *)media->context; + return cbfs_simple_buffer_unmap(&spi->buffer, address); +} + +int initialize_rockchip_spi_cbfs_media(struct cbfs_media *media, + void *buffer_address, size_t buffer_size) +{ + static struct rockchip_spi_media context; + static struct rockchip_spi_slave *eslave = &rockchip_spi_slaves[2]; + context.slave = &eslave->slave; + context.buffer.allocated = context.buffer.last_allocate = 0; + context.buffer.buffer = buffer_address; + context.buffer.size = buffer_size; + media->context = (void *)&context; + media->open = rockchip_spi_cbfs_open; + media->close = rockchip_spi_cbfs_close; + media->read = rockchip_spi_cbfs_read; + media->map = rockchip_spi_cbfs_map; + media->unmap = rockchip_spi_cbfs_unmap; + + return 0; +} diff --git a/src/soc/rockchip/rk3288/spi.h b/src/soc/rockchip/rk3288/spi.h new file mode 100755 index 0000000000..c6880c2b23 --- /dev/null +++ b/src/soc/rockchip/rk3288/spi.h @@ -0,0 +1,204 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 2014 Rockchip Inc. + * + * 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. + * + * 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 St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef __SOC_ROCKCHIP_RK3288_SPI_H__ +#define __SOC_ROCKCHIP_RK3288_SPI_H__ + +/* This driver serves as a CBFS media source. */ +#include <cbfs.h> +#include <spi-generic.h> +#include <stdint.h> + +struct rockchip_spi { + u32 ctrlr0; + u32 ctrlr1; + u32 spienr; + u32 ser; + u32 baudr; + u32 txftlr; + u32 rxftlr; + u32 txflr; + u32 rxflr; + u32 sr; + u32 ipr; + u32 imr; + u32 isr; + u32 risr; + u32 icr; + u32 dmacr; + u32 damtdlr; + u32 damrdlr; + u32 reserved[(0x400-0x48)/4]; + u32 txdr[0x100]; + u32 rxdr[0x100]; +}; +check_member(rockchip_spi, rxdr, 0x800); + + +#define SF_READ_DATA_CMD 0x3 + +/* --------Bit fields in CTRLR0--------begin */ + +#define SPI_DFS_OFFSET 0 /* Data Frame Size */ +#define SPI_DFS_MASK 0x3 +#define SPI_DFS_4BIT 0x00 +#define SPI_DFS_8BIT 0x01 +#define SPI_DFS_16BIT 0x02 +#define SPI_DFS_RESV 0x03 + +/* Control Frame Size */ +#define SPI_CFS_OFFSET 2 +#define SPI_CFS_MASK 0xF + +/* Serial Clock Phase */ +#define SPI_SCPH_OFFSET 6 +#define SPI_SCPH_MASK 0x1 + +/* Serial clock toggles in middle of first data bit */ +#define SPI_SCPH_TOGMID 0 + +/* Serial clock toggles at start of first data bit */ +#define SPI_SCPH_TOGSTA 1 + +/* Serial Clock Polarity */ +#define SPI_SCOL_OFFSET 7 +#define SPI_SCOL_MASK 0x1 + +/* Inactive state of clock serial clock is low */ +#define SPI_SCOL_LOW 0 + +/* Inactive state of clock serial clock is high */ +#define SPI_SCOL_HIGH 1 + +/* Chip Select Mode */ +#define SPI_CSM_OFFSET 8 +#define SPI_CSM_MASK 0x3 + +/* ss_n keep low after every frame data is transferred */ +#define SPI_CSM_KEEP 0x00 + +/* + * ss_n be high for half sclk_out cycles after + * every frame data is transferred + */ +#define SPI_CSM_HALF 0x01 + +/* ss_n be high for one sclk_out cycle after every frame data is transferred */ +#define SPI_CSM_ONE 0x02 +#define SPI_CSM_RESV 0x03 + +/* SSN to Sclk_out delay */ +#define SPI_SSN_DELAY_OFFSET 10 +#define SPI_SSN_DELAY_MASK 0x1 +/* the peroid between ss_n active and sclk_out active is half sclk_out cycles */ +#define SPI_SSN_DELAY_HALF 0x00 +/* the peroid between ss_n active and sclk_out active is one sclk_out cycle */ +#define SPI_SSN_DELAY_ONE 0x01 + +/* Serial Endian Mode */ +#define SPI_SEM_OFFSET 11 +#define SPI_SEM_MASK 0x1 +/* little endian */ +#define SPI_SEM_LITTLE 0x00 +/* big endian */ +#define SPI_SEM_BIG 0x01 + +/* First Bit Mode */ +#define SPI_FBM_OFFSET 12 +#define SPI_FBM_MASK 0x1 +/* first bit in MSB */ +#define SPI_FBM_MSB 0x00 +/* first bit in LSB */ +#define SPI_FBM_LSB 0x01 + +/* Byte and Halfword Transform */ +#define SPI_HALF_WORLD_TX_OFFSET 13 +#define SPI_HALF_WORLD_MASK 0x1 +/* apb 16bit write/read, spi 8bit write/read */ +#define SPI_APB_16BIT 0x00 +/* apb 8bit write/read, spi 8bit write/read */ +#define SPI_APB_8BIT 0x01 + +/* Rxd Sample Delay */ +#define SPI_RXDSD_OFFSET 14 +#define SPI_RXDSD_MASK 0x3 + +/* Frame Format */ +#define SPI_FRF_OFFSET 16 +#define SPI_FRF_MASK 0x3 +/* motorola spi */ +#define SPI_FRF_SPI 0x00 +/* Texas Instruments SSP*/ +#define SPI_FRF_SSP 0x01 +/* National Semiconductors Microwire */ +#define SPI_FRF_MICROWIRE 0x02 +#define SPI_FRF_RESV 0x03 + +/* Transfer Mode */ +#define SPI_TMOD_OFFSET 18 +#define SPI_TMOD_MASK 0x3 +/* xmit & recv */ +#define SPI_TMOD_TR 0x00 +/* xmit only */ +#define SPI_TMOD_TO 0x01 +/* recv only */ +#define SPI_TMOD_RO 0x02 +#define SPI_TMOD_RESV 0x03 + +/* Operation Mode */ +#define SPI_OMOD_OFFSET 20 +#define SPI_OMOD_MASK 0x1 +/* Master Mode */ +#define SPI_OMOD_MASTER 0x00 +/* Slave Mode */ +#define SPI_OMOD_SLAVE 0x01 + +/* --------Bit fields in CTRLR0--------end */ +/* Bit fields in SR, 7 bits */ +#define SR_MASK 0x7f +#define SR_BUSY (1 << 0) +#define SR_TF_FULL (1 << 1) +#define SR_TF_EMPT (1 << 2) +#define SR_RF_EMPT (1 << 3) +#define SR_RF_FULL (1 << 4) + +/* Bit fields in ISR, IMR, RISR, 7 bits */ +#define SPI_INT_TXEI (1 << 0) +#define SPI_INT_TXOI (1 << 1) +#define SPI_INT_RXUI (1 << 2) +#define SPI_INT_RXOI (1 << 3) +#define SPI_INT_RXFI (1 << 4) + +/* Bit fields in DMACR */ +#define SPI_DMACR_TX_ENABLE (1 << 1) +#define SPI_DMACR_RX_ENABLE (1 << 0) + +/* Bit fields in ICR */ +#define SPI_CLEAR_INT_ALL (1 << 0) +#define SPI_CLEAR_INT_RXUI (1 << 1) +#define SPI_CLEAR_INT_RXOI (1 << 2) +#define SPI_CLEAR_INT_TXOI (1 << 3) + +/* Serve as CBFS media source */ +int initialize_rockchip_spi_cbfs_media(struct cbfs_media *media, + void *buffer_address, + size_t buffer_size); +void rockchip_spi_init(unsigned int bus); + +#endif |