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rockchip: rk3399: add spi clock driver 

This patch implements spi clock driver and initialize
SPI flash rom for the baseboard gru.

There are 6 on-chip SPI controllers inside RK3399. For
SPI3, it's source clk from ppll, while the others from gpll.

Please refer to CRU session of TRM for detail.

BRANCH=none
BUG=chrome-os-partner:51537
TEST=emerge-kevin coreboot

Change-Id: I597ae2cc8ba1bfaefdfbf6116027d009daa8e049
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 4c6a9b0aedd427727ed4f4a821c5c54fb3a174b9
Original-Change-Id: I68ad859bf4fc5dacaaee5a2cd33418c729cf39b8
Original-Signed-off-by: huang lin <hl@rock-chips.com>
Original-Signed-off-by: Shunqian Zheng <zhengsq@rock-chips.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/338946
Original-Commit-Ready: Vadim Bendebury <vbendeb@chromium.org>
Original-Tested-by: Vadim Bendebury <vbendeb@chromium.org>
Original-Reviewed-by: Vadim Bendebury <vbendeb@chromium.org>
Reviewed-on: https://review.coreboot.org/14710
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
This commit is contained in:
Shunqian Zheng 2016-04-13 22:34:39 +08:00 committed by Patrick Georgi
parent a1f873f069
commit 347c83cfc9
2 changed files with 83 additions and 0 deletions
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6
src/mainboard/google/gru/bootblock.c
View File

@ -17,6 +17,7 @@
#include <arch/io.h>
#include <bootblock_common.h>
#include <soc/grf.h>
#include <soc/spi.h>
#include <console/console.h>
void bootblock_mainboard_early_init(void)
@ -35,4 +36,9 @@ void bootblock_mainboard_early_init(void)
void bootblock_mainboard_init(void)
{
/* select the pinmux for spi flashrom */
write32(&rk3399_pmugrf->spi1_rxd, IOMUX_SPI1_RX);
write32(&rk3399_pmugrf->spi1_csclktx, IOMUX_SPI1_CSCLKTX);
rockchip_spi_init(CONFIG_BOOT_MEDIA_SPI_BUS, 24750*KHz);
}

77
src/soc/rockchip/rk3399/clock.c
View File

@ -86,6 +86,14 @@ enum {
PMU_PCLK_DIV_CON_MASK = 0x1f,
PMU_PCLK_DIV_CON_SHIFT = 0,
/* PMUCRU_CLKSEL_CON1 */
SPI3_PLL_SEL_MASK = 1,
SPI3_PLL_SEL_SHIFT = 7,
SPI3_PLL_SEL_24M = 0,
SPI3_PLL_SEL_PPLL = 1,
SPI3_DIV_CON_MASK = 0x7f,
SPI3_DIV_CON_SHIFT = 0x0,
/* CLKSEL_CON0 */
ACLKM_CORE_L_DIV_CON_MASK = 0x1f,
ACLKM_CORE_L_DIV_CON_SHIFT = 8,
@ -138,6 +146,26 @@ enum {
HCLK_PERILP1_DIV_CON_MASK = 0x1f,
HCLK_PERILP1_DIV_CON_SHIFT = 0,
/* CLKSEL_CON58 */
CLK_SPI_PLL_SEL_MASK = 1,
CLK_SPI_PLL_SEL_CPLL = 0,
CLK_SPI_PLL_SEL_GPLL = 1,
CLK_SPI_PLL_DIV_CON_MASK = 0x7f,
CLK_SPI5_PLL_DIV_CON_SHIFT = 8,
CLK_SPI5_PLL_SEL_SHIFT = 15,
/* CLKSEL_CON59 */
CLK_SPI1_PLL_SEL_SHIFT = 15,
CLK_SPI1_PLL_DIV_CON_SHIFT = 8,
CLK_SPI0_PLL_SEL_SHIFT = 7,
CLK_SPI0_PLL_DIV_CON_SHIFT = 0,
/* CLKSEL_CON60 */
CLK_SPI4_PLL_SEL_SHIFT = 15,
CLK_SPI4_PLL_DIV_CON_SHIFT = 8,
CLK_SPI2_PLL_SEL_SHIFT = 7,
CLK_SPI2_PLL_DIV_CON_SHIFT = 0,
/* CRU_SOFTRST_CON4 */
RESETN_DDR0_REQ_MASK = 1,
RESETN_DDR0_REQ_SHIFT = 8,
@ -391,6 +419,55 @@ void rkclk_configure_ddr(unsigned int hz)
rkclk_set_pll(&cru_ptr->dpll_con[0], &dpll_cfg);
}
#define SPI_CLK_REG_VALUE(bus, clk_div) \
RK_CLRSETBITS(CLK_SPI_PLL_SEL_MASK << \
CLK_SPI ##bus## _PLL_SEL_SHIFT | \
CLK_SPI_PLL_DIV_CON_MASK << \
CLK_SPI ##bus## _PLL_DIV_CON_SHIFT, \
CLK_SPI_PLL_SEL_GPLL << \
CLK_SPI ##bus## _PLL_SEL_SHIFT | \
(clk_div - 1) << \
CLK_SPI ##bus## _PLL_DIV_CON_SHIFT)
void rkclk_configure_spi(unsigned int bus, unsigned int hz)
{
int src_clk_div;
int pll;
/* spi3 src clock from ppll, while spi0,1,2,4,5 src clock from gpll */
pll = (bus == 3) ? PPLL_HZ : GPLL_HZ;
src_clk_div = pll / hz;
assert((src_clk_div - 1 < 127) && (src_clk_div * hz == pll));
switch (bus) {
case 0:
write32(&cru_ptr->clksel_con[59],
SPI_CLK_REG_VALUE(0, src_clk_div));
break;
case 1:
write32(&cru_ptr->clksel_con[59],
SPI_CLK_REG_VALUE(1, src_clk_div));
break;
case 2:
write32(&cru_ptr->clksel_con[60],
SPI_CLK_REG_VALUE(2, src_clk_div));
break;
case 3:
write32(&pmucru_ptr->pmucru_clksel[1],
RK_CLRSETBITS(SPI3_PLL_SEL_MASK << SPI3_PLL_SEL_SHIFT |
SPI3_DIV_CON_MASK << SPI3_DIV_CON_SHIFT,
SPI3_PLL_SEL_PPLL << SPI3_PLL_SEL_SHIFT |
(src_clk_div - 1) << SPI3_DIV_CON_SHIFT));
break;
case 4:
write32(&cru_ptr->clksel_con[60],
SPI_CLK_REG_VALUE(4, src_clk_div));
break;
case 5:
write32(&cru_ptr->clksel_con[58],
SPI_CLK_REG_VALUE(5, src_clk_div));
break;
default:
printk(BIOS_ERR, "do not support this spi bus\n");
}
}