drivers/spi/cadence_qspi.h

   1 /* SPDX-License-Identifier: GPL-2.0+ */
   2 /*
   3  * Copyright (C) 2012
   4  * Altera Corporation <www.altera.com>
   5  */
   6
   7 #ifndef __CADENCE_QSPI_H__
   8 #define __CADENCE_QSPI_H__
   9
  10 #define CQSPI_IS_ADDR(cmd_len)          (cmd_len > 1 ? 1 : 0)
  11
  12 #define CQSPI_NO_DECODER_MAX_CS         4
  13 #define CQSPI_DECODER_MAX_CS            16
  14 #define CQSPI_READ_CAPTURE_MAX_DELAY    16
  15
  16 struct cadence_spi_platdata {
  17         unsigned int    max_hz;
  18         void            *regbase;
  19         void            *ahbbase;
  20         bool            is_decoded_cs;
  21         u32             fifo_depth;
  22         u32             fifo_width;
  23         u32             trigger_address;
  24
  25         /* Flash parameters */
  26         u32             page_size;
  27         u32             block_size;
  28         u32             tshsl_ns;
  29         u32             tsd2d_ns;
  30         u32             tchsh_ns;
  31         u32             tslch_ns;
  32 };
  33
  34 struct cadence_spi_priv {
  35         void            *regbase;
  36         void            *ahbbase;
  37         size_t          cmd_len;
  38         u8              cmd_buf[32];
  39         size_t          data_len;
  40
  41         int             qspi_is_init;
  42         unsigned int    qspi_calibrated_hz;
  43         unsigned int    qspi_calibrated_cs;
  44         unsigned int    previous_hz;
  45 };
  46
  47 /* Functions call declaration */
  48 void cadence_qspi_apb_controller_init(struct cadence_spi_platdata *plat);
  49 void cadence_qspi_apb_controller_enable(void *reg_base_addr);
  50 void cadence_qspi_apb_controller_disable(void *reg_base_addr);
  51
  52 int cadence_qspi_apb_command_read(void *reg_base_addr,
  53         unsigned int cmdlen, const u8 *cmdbuf, unsigned int rxlen, u8 *rxbuf);
  54 int cadence_qspi_apb_command_write(void *reg_base_addr,
  55         unsigned int cmdlen, const u8 *cmdbuf,
  56         unsigned int txlen,  const u8 *txbuf);
  57
  58 int cadence_qspi_apb_indirect_read_setup(struct cadence_spi_platdata *plat,
  59         unsigned int cmdlen, unsigned int rx_width, const u8 *cmdbuf);
  60 int cadence_qspi_apb_indirect_read_execute(struct cadence_spi_platdata *plat,
  61         unsigned int rxlen, u8 *rxbuf);
  62 int cadence_qspi_apb_indirect_write_setup(struct cadence_spi_platdata *plat,
  63         unsigned int cmdlen, const u8 *cmdbuf);
  64 int cadence_qspi_apb_indirect_write_execute(struct cadence_spi_platdata *plat,
  65         unsigned int txlen, const u8 *txbuf);
  66
  67 void cadence_qspi_apb_chipselect(void *reg_base,
  68         unsigned int chip_select, unsigned int decoder_enable);
  69 void cadence_qspi_apb_set_clk_mode(void *reg_base, uint mode);
  70 void cadence_qspi_apb_config_baudrate_div(void *reg_base,
  71         unsigned int ref_clk_hz, unsigned int sclk_hz);
  72 void cadence_qspi_apb_delay(void *reg_base,
  73         unsigned int ref_clk, unsigned int sclk_hz,
  74         unsigned int tshsl_ns, unsigned int tsd2d_ns,
  75         unsigned int tchsh_ns, unsigned int tslch_ns);
  76 void cadence_qspi_apb_enter_xip(void *reg_base, char xip_dummy);
  77 void cadence_qspi_apb_readdata_capture(void *reg_base,
  78         unsigned int bypass, unsigned int delay);
  79
  80 #endif /* __CADENCE_QSPI_H__ */