Add Tegra2 SPI controller.

tegra2_spi.h

+/*
+ * This file is part of the flashrom project.
+ *
+ * Copyright (C) 2010 NVIDIA Corporation
+ * Copyright (C) 2011 Google 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; 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 St, Fifth Floor, Boston, MA  02110-1301 USA
+ */
+
+#ifndef __TEGRA2_SPI_H__
+#define __TEGRA2_SPI_H__
+
+// ***************************************************************************
+// Hardware BARs
+
+#define TEGRA2_GPIO_BASE                        0x6000D000
+#define TEGRA2_SPI_BASE                         0x7000C380
+#define NV_ADDRESS_MAP_PPSB_CLK_RST_BASE        0x60006000
+#define NV_ADDRESS_MAP_APB_MISC_BASE            0x70000000
+
+// ***************************************************************************
+// Clock/reset controller
+#define CLK_RST_ENB_H_0_OFFSET  0x14
+#define CLK_RST_ENB_H_0_SPI1    (1 << 11)
+
+// ***************************************************************************
+// GPIO controller
+
+#define GPIO_OFF(port)          (((port / 4) * 128) + ((port % 4) * 4))
+#define GPIO_CNF(port)          (gpio_base + GPIO_OFF(port) + 0x00)
+#define GPIO_OE(port)           (gpio_base + GPIO_OFF(port) + 0x10)
+#define GPIO_OUT(port)          (gpio_base + GPIO_OFF(port) + 0x20)
+#define GPIO_IN(port)           (gpio_base + GPIO_OFF(port) + 0x30)
+#define GPIO_INT_STA(port)      (gpio_base + GPIO_OFF(port) + 0x40)
+#define GPIO_INT_ENB(port)      (gpio_base + GPIO_OFF(port) + 0x50)
+#define GPIO_INT_LVL(port)      (gpio_base + GPIO_OFF(port) + 0x60)
+#define GPIO_INT_CLR(port)      (gpio_base + GPIO_OFF(port) + 0x70)
+
+// ***************************************************************************
+// go away code
+
+#define SPI_XFER_BEGIN  0x01                    /* Assert CS before transfer */
+#define SPI_XFER_END    0x02                    /* Deassert CS after transfer */
+

[Stefan Reinauer, 2011/03/25 17:01:17]

The whole "go away code" section is not used anymore and should be dropped.

[Louis, 2011/03/30 10:15:39]

Done.

+// ***************************************************************************
+// SPI controller
+
+typedef struct spi_tegra {
+        uint32_t command;       /* SPI_COMMAND_0 register  */
+        uint32_t status;        /* SPI_STATUS_0 register */
+        uint32_t rx_cmp;        /* SPI_RX_CMP_0 register  */
+        uint32_t dma_ctl;       /* SPI_DMA_CTL_0 register */
+        uint32_t tx_fifo;       /* SPI_TX_FIFO_0 register */
+        uint32_t rsvd[3];       /* offsets 0x14 to 0x1F reserved */
+        uint32_t rx_fifo;       /* SPI_RX_FIFO_0 register */
+
+} spi_tegra_t;

[Stefan Reinauer, 2011/03/25 17:01:17]

This struct is no longer used. It should be dropped.

[Louis, 2011/03/30 10:15:39]

Done.

+
+#define SPI_CMD_GO              (1 << 30)
+#define SPI_CMD_ACTIVE_SCLK     (1 << 26)
+#define SPI_CMD_CK_SDA          (1 << 21)
+#define SPI_CMD_ACTIVE_SDA      (1 << 18)
+#define SPI_CMD_CS_POL          (1 << 16)
+#define SPI_CMD_TXEN            (1 << 15)
+#define SPI_CMD_RXEN            (1 << 14)
+#define SPI_CMD_CS_VAL          (1 << 13)
+#define SPI_CMD_CS_SOFT         (1 << 12)
+#define SPI_CMD_CS_DELAY        (1 << 9)
+#define SPI_CMD_CS3_EN          (1 << 8)
+#define SPI_CMD_CS2_EN          (1 << 7)
+#define SPI_CMD_CS1_EN          (1 << 6)
+#define SPI_CMD_CS0_EN          (1 << 5)
+#define SPI_CMD_BIT_LENGTH      (1 << 4)
+#define SPI_CMD_BIT_LENGTH_MASK 0x0000001F
+
+#define SPI_STAT_BSY            (1 << 31)
+#define SPI_STAT_RDY            (1 << 30)
+#define SPI_STAT_RXF_FLUSH      (1 << 29)
+#define SPI_STAT_TXF_FLUSH      (1 << 28)
+#define SPI_STAT_RXF_UNR        (1 << 27)
+#define SPI_STAT_TXF_OVF        (1 << 26)
+#define SPI_STAT_RXF_EMPTY      (1 << 25)
+#define SPI_STAT_RXF_FULL       (1 << 24)
+#define SPI_STAT_TXF_EMPTY      (1 << 23)
+#define SPI_STAT_TXF_FULL       (1 << 22)
+#define SPI_STAT_SEL_TXRX_N     (1 << 16)
+#define SPI_STAT_CUR_BLKCNT     (1 << 15)
+
+#endif  /* __TEGRA2_SPI_H__ */