+#ifdef CONFIG_SPI_BOOTING
+static void spi_rx_tx(struct exynos_spi *regs, int todo,
+ void *dinp, void const *doutp, int i)
+{
+ uint *rxp = (uint *)(dinp + (i * (32 * 1024)));
+ int rx_lvl, tx_lvl;
+ uint out_bytes, in_bytes;
+
+ out_bytes = todo;
+ in_bytes = todo;
+ setbits_le32(®s->ch_cfg, SPI_CH_RST);
+ clrbits_le32(®s->ch_cfg, SPI_CH_RST);
+ writel(((todo * 8) / 32) | SPI_PACKET_CNT_EN, ®s->pkt_cnt);
+
+ while (in_bytes) {
+ uint32_t spi_sts;
+ int temp;
+
+ spi_sts = readl(®s->spi_sts);
+ rx_lvl = ((spi_sts >> 15) & 0x7f);
+ tx_lvl = ((spi_sts >> 6) & 0x7f);
+ while (tx_lvl < 32 && out_bytes) {
+ temp = 0xffffffff;
+ writel(temp, ®s->tx_data);
+ out_bytes -= 4;
+ tx_lvl += 4;
+ }
+ while (rx_lvl >= 4 && in_bytes) {
+ temp = readl(®s->rx_data);
+ if (rxp)
+ *rxp++ = temp;
+ in_bytes -= 4;
+ rx_lvl -= 4;
+ }
+ }
+}
+
+/*
+ * Copy uboot from spi flash to RAM
+ *
+ * @parma uboot_size size of u-boot to copy
+ * @param uboot_addr address in u-boot to copy
+ */
+static void exynos_spi_copy(unsigned int uboot_size, unsigned int uboot_addr)
+{
+ int upto, todo;
+ int i, timeout = 100;
+ struct exynos_spi *regs = (struct exynos_spi *)CONFIG_ENV_SPI_BASE;
+
+ set_spi_clk(PERIPH_ID_SPI1, 50000000); /* set spi clock to 50Mhz */
+ /* set the spi1 GPIO */
+ exynos_pinmux_config(PERIPH_ID_SPI1, PINMUX_FLAG_NONE);
+
+ /* set pktcnt and enable it */
+ writel(4 | SPI_PACKET_CNT_EN, ®s->pkt_cnt);
+ /* set FB_CLK_SEL */
+ writel(SPI_FB_DELAY_180, ®s->fb_clk);
+ /* set CH_WIDTH and BUS_WIDTH as word */
+ setbits_le32(®s->mode_cfg, SPI_MODE_CH_WIDTH_WORD |
+ SPI_MODE_BUS_WIDTH_WORD);
+ clrbits_le32(®s->ch_cfg, SPI_CH_CPOL_L); /* CPOL: active high */
+
+ /* clear rx and tx channel if set priveously */
+ clrbits_le32(®s->ch_cfg, SPI_RX_CH_ON | SPI_TX_CH_ON);
+
+ setbits_le32(®s->swap_cfg, SPI_RX_SWAP_EN |
+ SPI_RX_BYTE_SWAP |
+ SPI_RX_HWORD_SWAP);
+
+ /* do a soft reset */
+ setbits_le32(®s->ch_cfg, SPI_CH_RST);
+ clrbits_le32(®s->ch_cfg, SPI_CH_RST);
+
+ /* now set rx and tx channel ON */
+ setbits_le32(®s->ch_cfg, SPI_RX_CH_ON | SPI_TX_CH_ON | SPI_CH_HS_EN);
+ clrbits_le32(®s->cs_reg, SPI_SLAVE_SIG_INACT); /* CS low */
+
+ /* Send read instruction (0x3h) followed by a 24 bit addr */
+ writel((SF_READ_DATA_CMD << 24) | SPI_FLASH_UBOOT_POS, ®s->tx_data);
+
+ /* waiting for TX done */
+ while (!(readl(®s->spi_sts) & SPI_ST_TX_DONE)) {
+ if (!timeout) {
+ debug("SPI TIMEOUT\n");
+ break;
+ }
+ timeout--;
+ }
+
+ for (upto = 0, i = 0; upto < uboot_size; upto += todo, i++) {
+ todo = min(uboot_size - upto, (unsigned int)(1 << 15));
+ spi_rx_tx(regs, todo, (void *)(uboot_addr),
+ (void *)(SPI_FLASH_UBOOT_POS), i);
+ }
+
+ setbits_le32(®s->cs_reg, SPI_SLAVE_SIG_INACT);/* make the CS high */
+
+ /*
+ * Let put controller mode to BYTE as
+ * SPI driver does not support WORD mode yet
+ */
+ clrbits_le32(®s->mode_cfg, SPI_MODE_CH_WIDTH_WORD |
+ SPI_MODE_BUS_WIDTH_WORD);
+ writel(0, ®s->swap_cfg);
+
+ /*
+ * Flush spi tx, rx fifos and reset the SPI controller
+ * and clear rx/tx channel
+ */
+ clrsetbits_le32(®s->ch_cfg, SPI_CH_HS_EN, SPI_CH_RST);
+ clrbits_le32(®s->ch_cfg, SPI_CH_RST);
+ clrbits_le32(®s->ch_cfg, SPI_TX_CH_ON | SPI_RX_CH_ON);
+}
+#endif
+