upstream u-boot with additional patches for our devices/boards:
https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ;
Gbit ethernet patch for some LIME2 revisions ;
with SPI flash support
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500 lines
11 KiB
500 lines
11 KiB
7 years ago
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/*
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* NDS SPI controller driver.
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*
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* Copyright 2017 Andes Technology, Inc.
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* Author: Rick Chen (rick@andestech.com)
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <clk.h>
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#include <common.h>
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#include <malloc.h>
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#include <spi.h>
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#include <asm/io.h>
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#include <dm.h>
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DECLARE_GLOBAL_DATA_PTR;
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#define MAX_TRANSFER_LEN 512
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#define CHUNK_SIZE 1
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#define SPI_TIMEOUT 0x100000
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#define SPI0_BUS 0
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#define SPI1_BUS 1
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#define SPI0_BASE 0xf0b00000
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#define SPI1_BASE 0xf0f00000
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#define NSPI_MAX_CS_NUM 1
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struct ae3xx_spi_regs {
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u32 rev;
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u32 reserve1[3];
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u32 format; /* 0x10 */
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#define DATA_LENGTH(x) ((x-1)<<8)
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u32 pio;
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u32 reserve2[2];
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u32 tctrl; /* 0x20 */
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#define TRAMODE_OFFSET 24
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#define TRAMODE_MASK (0x0F<<TRAMODE_OFFSET)
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#define TRAMODE_WR_SYNC (0<<TRAMODE_OFFSET)
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#define TRAMODE_WO (1<<TRAMODE_OFFSET)
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#define TRAMODE_RO (2<<TRAMODE_OFFSET)
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#define TRAMODE_WR (3<<TRAMODE_OFFSET)
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#define TRAMODE_RW (4<<TRAMODE_OFFSET)
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#define TRAMODE_WDR (5<<TRAMODE_OFFSET)
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#define TRAMODE_RDW (6<<TRAMODE_OFFSET)
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#define TRAMODE_NONE (7<<TRAMODE_OFFSET)
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#define TRAMODE_DW (8<<TRAMODE_OFFSET)
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#define TRAMODE_DR (9<<TRAMODE_OFFSET)
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#define WCNT_OFFSET 12
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#define WCNT_MASK (0x1FF<<WCNT_OFFSET)
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#define RCNT_OFFSET 0
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#define RCNT_MASK (0x1FF<<RCNT_OFFSET)
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u32 cmd;
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u32 addr;
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u32 data;
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u32 ctrl; /* 0x30 */
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#define TXFTH_OFFSET 16
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#define RXFTH_OFFSET 8
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#define TXDMAEN (1<<4)
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#define RXDMAEN (1<<3)
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#define TXFRST (1<<2)
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#define RXFRST (1<<1)
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#define SPIRST (1<<0)
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u32 status;
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#define TXFFL (1<<23)
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#define TXEPTY (1<<22)
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#define TXFVE_MASK (0x1F<<16)
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#define RXFEM (1<<14)
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#define RXFVE_OFFSET (8)
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#define RXFVE_MASK (0x1F<<RXFVE_OFFSET)
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#define SPIBSY (1<<0)
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u32 inten;
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u32 intsta;
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u32 timing; /* 0x40 */
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#define SCLK_DIV_MASK 0xFF
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};
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struct nds_spi_slave {
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#ifndef CONFIG_DM_SPI
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struct spi_slave slave;
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#endif
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volatile struct ae3xx_spi_regs *regs;
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int to;
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unsigned int freq;
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ulong clock;
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unsigned int mode;
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u8 num_cs;
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unsigned int mtiming;
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size_t cmd_len;
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u8 cmd_buf[16];
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size_t data_len;
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size_t tran_len;
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u8 *din;
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u8 *dout;
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unsigned int max_transfer_length;
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};
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static int __ae3xx_spi_set_speed(struct nds_spi_slave *ns)
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{
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u32 tm;
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u8 div;
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tm = ns->regs->timing;
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tm &= ~SCLK_DIV_MASK;
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if(ns->freq >= ns->clock)
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div =0xff;
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else{
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for (div = 0; div < 0xff; div++) {
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if (ns->freq >= ns->clock / (2 * (div + 1)))
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break;
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}
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}
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tm |= div;
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ns->regs->timing = tm;
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return 0;
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}
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static int __ae3xx_spi_claim_bus(struct nds_spi_slave *ns)
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{
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unsigned int format=0;
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ns->regs->ctrl |= (TXFRST|RXFRST|SPIRST);
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while((ns->regs->ctrl &(TXFRST|RXFRST|SPIRST))&&(ns->to--))
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if(!ns->to)
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return -EINVAL;
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ns->cmd_len = 0;
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format = ns->mode|DATA_LENGTH(8);
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ns->regs->format = format;
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__ae3xx_spi_set_speed(ns);
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return 0;
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}
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static int __ae3xx_spi_release_bus(struct nds_spi_slave *ns)
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{
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/* do nothing */
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return 0;
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}
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static int __ae3xx_spi_start(struct nds_spi_slave *ns)
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{
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int i,olen=0;
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int tc = ns->regs->tctrl;
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tc &= ~(WCNT_MASK|RCNT_MASK|TRAMODE_MASK);
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if ((ns->din)&&(ns->cmd_len))
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tc |= TRAMODE_WR;
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else if (ns->din)
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tc |= TRAMODE_RO;
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else
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tc |= TRAMODE_WO;
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if(ns->dout)
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olen = ns->tran_len;
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tc |= (ns->cmd_len+olen-1) << WCNT_OFFSET;
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if(ns->din)
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tc |= (ns->tran_len-1) << RCNT_OFFSET;
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ns->regs->tctrl = tc;
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ns->regs->cmd = 1;
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for (i=0;i<ns->cmd_len;i++)
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ns->regs->data = ns->cmd_buf[i];
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return 0;
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}
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static int __ae3xx_spi_stop(struct nds_spi_slave *ns)
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{
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ns->regs->timing = ns->mtiming;
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while ((ns->regs->status & SPIBSY)&&(ns->to--))
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if (!ns->to)
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return -EINVAL;
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return 0;
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}
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static void __nspi_espi_tx(struct nds_spi_slave *ns, const void *dout)
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{
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ns->regs->data = *(u8 *)dout;
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}
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static int __nspi_espi_rx(struct nds_spi_slave *ns, void *din, unsigned int bytes)
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{
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*(u8 *)din = ns->regs->data;
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return bytes;
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}
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static int __ae3xx_spi_xfer(struct nds_spi_slave *ns,
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unsigned int bitlen, const void *data_out, void *data_in,
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unsigned long flags)
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{
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unsigned int event, rx_bytes;
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const void *dout = NULL;
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void *din = NULL;
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int num_blks, num_chunks, max_tran_len, tran_len;
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int num_bytes;
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u8 *cmd_buf = ns->cmd_buf;
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size_t cmd_len = ns->cmd_len;
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size_t data_len = bitlen / 8;
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int rf_cnt;
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int ret = 0;
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max_tran_len = ns->max_transfer_length;
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switch (flags) {
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case SPI_XFER_BEGIN:
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cmd_len = ns->cmd_len = data_len;
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memcpy(cmd_buf, data_out, cmd_len);
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return 0;
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case 0:
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case SPI_XFER_END:
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if (bitlen == 0) {
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return 0;
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}
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ns->data_len = data_len;
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ns->din = (u8 *)data_in;
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ns->dout = (u8 *)data_out;
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break;
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case SPI_XFER_BEGIN | SPI_XFER_END:
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ns->data_len = 0;
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ns->din = 0;
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ns->dout = 0;
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cmd_len = ns->cmd_len = data_len;
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memcpy(cmd_buf, data_out, cmd_len);
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data_out = 0;
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data_len = 0;
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__ae3xx_spi_start(ns);
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break;
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}
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debug("spi_xfer: data_out %08X(%p) data_in %08X(%p) data_len %u\n",
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*(uint *)data_out, data_out, *(uint *)data_in, data_in, data_len);
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num_chunks = DIV_ROUND_UP(data_len, max_tran_len);
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din = data_in;
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dout = data_out;
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while (num_chunks--) {
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tran_len = min(data_len, (size_t)max_tran_len);
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ns->tran_len = tran_len;
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num_blks = DIV_ROUND_UP(tran_len , CHUNK_SIZE);
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num_bytes = (tran_len) % CHUNK_SIZE;
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if(num_bytes == 0)
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num_bytes = CHUNK_SIZE;
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__ae3xx_spi_start(ns);
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while (num_blks) {
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event = in_le32(&ns->regs->status);
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if ((event & TXEPTY) && (data_out)) {
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__nspi_espi_tx(ns, dout);
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num_blks -= CHUNK_SIZE;
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dout += CHUNK_SIZE;
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}
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if ((event & RXFVE_MASK) && (data_in)) {
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rf_cnt = ((event & RXFVE_MASK)>> RXFVE_OFFSET);
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if (rf_cnt >= CHUNK_SIZE)
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rx_bytes = CHUNK_SIZE;
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else if (num_blks == 1 && rf_cnt == num_bytes)
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rx_bytes = num_bytes;
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else
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continue;
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if (__nspi_espi_rx(ns, din, rx_bytes) == rx_bytes) {
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num_blks -= CHUNK_SIZE;
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din = (unsigned char *)din + rx_bytes;
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}
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}
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}
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data_len -= tran_len;
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if(data_len)
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{
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ns->cmd_buf[1] += ((tran_len>>16)&0xff);
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ns->cmd_buf[2] += ((tran_len>>8)&0xff);
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ns->cmd_buf[3] += ((tran_len)&0xff);
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ns->data_len = data_len;
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}
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ret = __ae3xx_spi_stop(ns);
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}
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ret = __ae3xx_spi_stop(ns);
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return ret;
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}
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#ifndef CONFIG_DM_SPI
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#define to_nds_spi_slave(s) container_of(s, struct nds_spi_slave, slave)
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struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
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unsigned int max_hz, unsigned int mode)
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{
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struct nds_spi_slave *ns;
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if (!spi_cs_is_valid(bus, cs))
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return NULL;
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ns = spi_alloc_slave(struct nds_spi_slave, bus, cs);
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switch (bus) {
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case SPI0_BUS:
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ns->regs = (struct ae3xx_spi_regs *)SPI0_BASE;
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break;
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case SPI1_BUS:
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ns->regs = (struct ae3xx_spi_regs *)SPI1_BASE;
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break;
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default:
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return NULL;
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}
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ns->freq= max_hz;
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ns->mode = mode;
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ns->to = SPI_TIMEOUT;
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ns->max_transfer_length = MAX_TRANSFER_LEN;
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ns->slave.max_write_size = MAX_TRANSFER_LEN;
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if (!ns)
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return NULL;
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return &ns->slave;
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}
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void spi_free_slave(struct spi_slave *slave)
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{
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struct nds_spi_slave *ns = to_nds_spi_slave(slave);
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free(ns);
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}
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void spi_init(void)
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{
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/* do nothing */
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}
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int spi_claim_bus(struct spi_slave *slave)
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{
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struct nds_spi_slave *ns = to_nds_spi_slave(slave);
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return __ae3xx_spi_claim_bus(ns);
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}
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void spi_release_bus(struct spi_slave *slave)
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{
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struct nds_spi_slave *ns = to_nds_spi_slave(slave);
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__ae3xx_spi_release_bus(ns);
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}
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int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *data_out,
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void *data_in, unsigned long flags)
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{
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struct nds_spi_slave *ns = to_nds_spi_slave(slave);
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return __ae3xx_spi_xfer(ns, bitlen, data_out, data_in, flags);
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}
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int spi_cs_is_valid(unsigned int bus, unsigned int cs)
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{
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return bus == 0 && cs < NSPI_MAX_CS_NUM;
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}
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void spi_cs_activate(struct spi_slave *slave)
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{
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struct nds_spi_slave *ns = to_nds_spi_slave(slave);
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__ae3xx_spi_start(ns);
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}
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void spi_cs_deactivate(struct spi_slave *slave)
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{
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struct nds_spi_slave *ns = to_nds_spi_slave(slave);
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__ae3xx_spi_stop(ns);
|
||
|
|
}
|
||
|
|
#else
|
||
|
|
static int ae3xx_spi_set_speed(struct udevice *bus, uint max_hz)
|
||
|
|
{
|
||
|
|
struct nds_spi_slave *ns = dev_get_priv(bus);
|
||
|
|
|
||
|
|
debug("%s speed %u\n", __func__, max_hz);
|
||
|
|
|
||
|
|
ns->freq = max_hz;
|
||
|
|
__ae3xx_spi_set_speed(ns);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int ae3xx_spi_set_mode(struct udevice *bus, uint mode)
|
||
|
|
{
|
||
|
|
struct nds_spi_slave *ns = dev_get_priv(bus);
|
||
|
|
|
||
|
|
debug("%s mode %u\n", __func__, mode);
|
||
|
|
ns->mode = mode;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int ae3xx_spi_claim_bus(struct udevice *dev)
|
||
|
|
{
|
||
|
|
struct dm_spi_slave_platdata *slave_plat =
|
||
|
|
dev_get_parent_platdata(dev);
|
||
|
|
struct udevice *bus = dev->parent;
|
||
|
|
struct nds_spi_slave *ns = dev_get_priv(bus);
|
||
|
|
|
||
|
|
if (slave_plat->cs >= ns->num_cs) {
|
||
|
|
printf("Invalid SPI chipselect\n");
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
return __ae3xx_spi_claim_bus(ns);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int ae3xx_spi_release_bus(struct udevice *dev)
|
||
|
|
{
|
||
|
|
struct nds_spi_slave *ns = dev_get_priv(dev->parent);
|
||
|
|
|
||
|
|
return __ae3xx_spi_release_bus(ns);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int ae3xx_spi_xfer(struct udevice *dev, unsigned int bitlen,
|
||
|
|
const void *dout, void *din,
|
||
|
|
unsigned long flags)
|
||
|
|
{
|
||
|
|
struct udevice *bus = dev->parent;
|
||
|
|
struct nds_spi_slave *ns = dev_get_priv(bus);
|
||
|
|
|
||
|
|
return __ae3xx_spi_xfer(ns, bitlen, dout, din, flags);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int ae3xx_spi_get_clk(struct udevice *bus)
|
||
|
|
{
|
||
|
|
struct nds_spi_slave *ns = dev_get_priv(bus);
|
||
|
|
struct clk clk;
|
||
|
|
ulong clk_rate;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
ret = clk_get_by_index(bus, 0, &clk);
|
||
|
|
if (ret)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
clk_rate = clk_get_rate(&clk);
|
||
|
|
if (!clk_rate)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
ns->clock = clk_rate;
|
||
|
|
clk_free(&clk);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int ae3xx_spi_probe(struct udevice *bus)
|
||
|
|
{
|
||
|
|
struct nds_spi_slave *ns = dev_get_priv(bus);
|
||
|
|
|
||
|
|
ns->to = SPI_TIMEOUT;
|
||
|
|
ns->max_transfer_length = MAX_TRANSFER_LEN;
|
||
|
|
ns->mtiming = ns->regs->timing;
|
||
|
|
ae3xx_spi_get_clk(bus);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int ae3xx_ofdata_to_platadata(struct udevice *bus)
|
||
|
|
{
|
||
|
|
struct nds_spi_slave *ns = dev_get_priv(bus);
|
||
|
|
const void *blob = gd->fdt_blob;
|
||
|
|
int node = dev_of_offset(bus);
|
||
|
|
|
||
|
|
ns->regs = map_physmem(devfdt_get_addr(bus),
|
||
|
|
sizeof(struct ae3xx_spi_regs),
|
||
|
|
MAP_NOCACHE);
|
||
|
|
if (!ns->regs) {
|
||
|
|
printf("%s: could not map device address\n", __func__);
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
ns->num_cs = fdtdec_get_int(blob, node, "num-cs", 4);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct dm_spi_ops ae3xx_spi_ops = {
|
||
|
|
.claim_bus = ae3xx_spi_claim_bus,
|
||
|
|
.release_bus = ae3xx_spi_release_bus,
|
||
|
|
.xfer = ae3xx_spi_xfer,
|
||
|
|
.set_speed = ae3xx_spi_set_speed,
|
||
|
|
.set_mode = ae3xx_spi_set_mode,
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct udevice_id ae3xx_spi_ids[] = {
|
||
|
|
{ .compatible = "andestech,atcspi200" },
|
||
|
|
{ }
|
||
|
|
};
|
||
|
|
|
||
|
|
U_BOOT_DRIVER(ae3xx_spi) = {
|
||
|
|
.name = "ae3xx_spi",
|
||
|
|
.id = UCLASS_SPI,
|
||
|
|
.of_match = ae3xx_spi_ids,
|
||
|
|
.ops = &ae3xx_spi_ops,
|
||
|
|
.ofdata_to_platdata = ae3xx_ofdata_to_platadata,
|
||
|
|
.priv_auto_alloc_size = sizeof(struct nds_spi_slave),
|
||
|
|
.probe = ae3xx_spi_probe,
|
||
|
|
};
|
||
|
|
#endif
|