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fb93bd8d26
At first SPI transfers, multiple chip selects can be enabled simultaneously. This is due to chip select polarity, which is not properly initialized for all channels. This patch fixes the issue. Signed-off-by: Julien Panis <jpanis@baylibre.com>
81 lines
2.4 KiB
C
81 lines
2.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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#ifndef __OMAP3_SPI_H_
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#define __OMAP3_SPI_H_
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/* per-register bitmasks */
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#define OMAP3_MCSPI_SYSCONFIG_SMARTIDLE (2 << 3)
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#define OMAP3_MCSPI_SYSCONFIG_ENAWAKEUP BIT(2)
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#define OMAP3_MCSPI_SYSCONFIG_AUTOIDLE BIT(0)
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#define OMAP3_MCSPI_SYSCONFIG_SOFTRESET BIT(1)
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#define OMAP3_MCSPI_SYSSTATUS_RESETDONE BIT(0)
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#define OMAP3_MCSPI_MODULCTRL_SINGLE BIT(0)
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#define OMAP3_MCSPI_MODULCTRL_MS BIT(2)
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#define OMAP3_MCSPI_MODULCTRL_STEST BIT(3)
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#define OMAP3_MCSPI_CHCONF_PHA BIT(0)
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#define OMAP3_MCSPI_CHCONF_POL BIT(1)
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#define OMAP3_MCSPI_CHCONF_CLKD_MASK GENMASK(5, 2)
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#define OMAP3_MCSPI_CHCONF_EPOL BIT(6)
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#define OMAP3_MCSPI_CHCONF_WL_MASK GENMASK(11, 7)
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#define OMAP3_MCSPI_CHCONF_TRM_RX_ONLY BIT(12)
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#define OMAP3_MCSPI_CHCONF_TRM_TX_ONLY BIT(13)
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#define OMAP3_MCSPI_CHCONF_TRM_MASK GENMASK(13, 12)
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#define OMAP3_MCSPI_CHCONF_DMAW BIT(14)
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#define OMAP3_MCSPI_CHCONF_DMAR BIT(15)
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#define OMAP3_MCSPI_CHCONF_DPE0 BIT(16)
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#define OMAP3_MCSPI_CHCONF_DPE1 BIT(17)
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#define OMAP3_MCSPI_CHCONF_IS BIT(18)
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#define OMAP3_MCSPI_CHCONF_TURBO BIT(19)
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#define OMAP3_MCSPI_CHCONF_FORCE BIT(20)
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#define OMAP3_MCSPI_CHSTAT_RXS BIT(0)
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#define OMAP3_MCSPI_CHSTAT_TXS BIT(1)
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#define OMAP3_MCSPI_CHSTAT_EOT BIT(2)
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#define OMAP3_MCSPI_CHCTRL_EN BIT(0)
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#define OMAP3_MCSPI_CHCTRL_DIS (0 << 0)
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#define OMAP3_MCSPI_WAKEUPENABLE_WKEN BIT(0)
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#define MCSPI_PINDIR_D0_IN_D1_OUT 0
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#define MCSPI_PINDIR_D0_OUT_D1_IN 1
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#define OMAP3_MCSPI_MAX_FREQ 48000000
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#define SPI_WAIT_TIMEOUT 10
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#define OMAP4_MCSPI_REG_OFFSET 0x100
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#define OMAP4_MCSPI_CHAN_NB 4
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/* OMAP3 McSPI registers */
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struct mcspi_channel {
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unsigned int chconf; /* 0x2C, 0x40, 0x54, 0x68 */
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unsigned int chstat; /* 0x30, 0x44, 0x58, 0x6C */
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unsigned int chctrl; /* 0x34, 0x48, 0x5C, 0x70 */
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unsigned int tx; /* 0x38, 0x4C, 0x60, 0x74 */
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unsigned int rx; /* 0x3C, 0x50, 0x64, 0x78 */
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};
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struct mcspi {
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unsigned char res1[0x10];
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unsigned int sysconfig; /* 0x10 */
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unsigned int sysstatus; /* 0x14 */
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unsigned int irqstatus; /* 0x18 */
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unsigned int irqenable; /* 0x1C */
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unsigned int wakeupenable; /* 0x20 */
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unsigned int syst; /* 0x24 */
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unsigned int modulctrl; /* 0x28 */
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struct mcspi_channel channel[OMAP4_MCSPI_CHAN_NB];
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/* channel0: 0x2C - 0x3C, bus 0 & 1 & 2 & 3 */
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/* channel1: 0x40 - 0x50, bus 0 & 1 */
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/* channel2: 0x54 - 0x64, bus 0 & 1 */
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/* channel3: 0x68 - 0x78, bus 0 */
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};
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struct omap3_spi_plat {
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struct mcspi *regs;
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unsigned int pin_dir:1;
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};
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#endif
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