bsps: Move SPI drivers to bsps

This patch is a part of the BSP source reorganization.

Update #3285.

2 files changed, 1 insertions, 450 deletions

diff --git a/c/src/lib/libbsp/arm/imx/Makefile.am b/c/src/lib/libbsp/arm/imx/Makefile.am
index 3426433800..5d151d693f 100644
--- a/c/src/lib/libbsp/arm/imx/Makefile.am
+++ b/c/src/lib/libbsp/arm/imx/Makefile.am
@@ -69,7 +69,7 @@ librtemsbsp_a_SOURCES += ../../../../../../bsps/arm/shared/cache/cache-cp15.c
 librtemsbsp_a_SOURCES += ../../../../../../bsps/arm/imx/i2c/imx-i2c.c
 
 # SPI
-librtemsbsp_a_SOURCES += spi/imx-ecspi.c
+librtemsbsp_a_SOURCES += ../../../../../../bsps/arm/imx/spi/imx-ecspi.c
 
 # Start hooks
 librtemsbsp_a_SOURCES += ../../../../../../bsps/arm/imx/start/bspstarthooks.c
diff --git a/c/src/lib/libbsp/arm/imx/spi/imx-ecspi.c b/c/src/lib/libbsp/arm/imx/spi/imx-ecspi.c
deleted file mode 100644
index 9a232c53e9..0000000000
--- a/c/src/lib/libbsp/arm/imx/spi/imx-ecspi.c
+++ /dev/null
@@ -1,449 +0,0 @@
-/*
- * Copyright (c) 2017 embedded brains GmbH.  All rights reserved.
- *
- *  embedded brains GmbH
- *  Dornierstr. 4
- *  82178 Puchheim
- *  Germany
- *  <info@embedded-brains.de>
- *
- * The license and distribution terms for this file may be
- * found in the file LICENSE in this distribution or at
- * http://www.rtems.org/license/LICENSE.
- */
-
-#include <bsp.h>
-#include <bsp/fdt.h>
-#include <libfdt.h>
-#include <arm/freescale/imx/imx_ccmvar.h>
-#include <arm/freescale/imx/imx_ecspireg.h>
-#include <dev/spi/spi.h>
-#include <rtems/irq-extension.h>
-#include <sys/param.h>
-#include <sys/endian.h>
-
-#define IMX_ECSPI_FIFO_SIZE 64
-
-typedef struct imx_ecspi_bus imx_ecspi_bus;
-
-struct imx_ecspi_bus {
-  spi_bus base;
-  volatile imx_ecspi *regs;
-  uint32_t conreg;
-  uint32_t speed_hz;
-  uint32_t mode;
-  uint8_t bits_per_word;
-  uint8_t cs;
-  uint32_t msg_todo;
-  const spi_ioc_transfer *msg;
-  uint32_t todo;
-  uint32_t in_transfer;
-  uint8_t *rx_buf;
-  const uint8_t *tx_buf;
-  void (*push)(imx_ecspi_bus *, volatile imx_ecspi *);
-  void (*pop)(imx_ecspi_bus *, volatile imx_ecspi *);
-  rtems_id task_id;
-  rtems_vector_number irq;
-};
-
-static bool imx_ecspi_is_rx_fifo_not_empty(volatile imx_ecspi *regs)
-{
-  return (regs->statreg & IMX_ECSPI_RR) != 0;
-}
-
-static void imx_ecspi_reset(volatile imx_ecspi *regs)
-{
-  while (imx_ecspi_is_rx_fifo_not_empty(regs)) {
-    regs->rxdata;
-  }
-}
-
-static void imx_ecspi_done(imx_ecspi_bus *bus)
-{
-  rtems_event_transient_send(bus->task_id);
-}
-
-#define IMC_ECSPI_PUSH(type) \
-static void imx_ecspi_push_##type(imx_ecspi_bus *bus, volatile imx_ecspi *regs) \
-{ \
-  type val = 0; \
-  if (bus->tx_buf != NULL) { \
-    val = *(type *)bus->tx_buf; \
-    bus->tx_buf += sizeof(type); \
-  } \
-  bus->todo -= sizeof(type); \
-  regs->txdata = val; \
-}
-
-#define IMX_ECSPI_POP(type) \
-static void imx_ecspi_pop_##type(imx_ecspi_bus *bus, volatile imx_ecspi *regs) \
-{ \
-  uint32_t val = regs->rxdata; \
-  if (bus->rx_buf != NULL) { \
-    *(type *)bus->rx_buf = val; \
-    bus->rx_buf += sizeof(type); \
-  } \
-}
-
-IMC_ECSPI_PUSH(uint8_t)
-IMX_ECSPI_POP(uint8_t)
-IMC_ECSPI_PUSH(uint16_t)
-IMX_ECSPI_POP(uint16_t)
-IMC_ECSPI_PUSH(uint32_t)
-IMX_ECSPI_POP(uint32_t)
-
-static void imx_ecspi_push_uint32_t_swap(
-  imx_ecspi_bus *bus,
-  volatile imx_ecspi *regs
-)
-{
-  uint32_t val = 0;
-
-  if (bus->tx_buf != NULL) {
-    val = bswap32(*(uint32_t *)bus->tx_buf);
-    bus->tx_buf += sizeof(uint32_t);
-  }
-
-  bus->todo -= sizeof(uint32_t);
-  regs->txdata = val;
-}
-
-static void imx_ecspi_pop_uint32_t_swap(
-  imx_ecspi_bus *bus,
-  volatile imx_ecspi *regs
-)
-{
-  uint32_t val = regs->rxdata;
-
-  if (bus->rx_buf != NULL) {
-    *(uint32_t *)bus->rx_buf = bswap32(val);
-    bus->rx_buf += sizeof(uint32_t);
-  }
-}
-
-static void imx_ecspi_push(imx_ecspi_bus *bus, volatile imx_ecspi *regs)
-{
-  while (bus->todo > 0 && bus->in_transfer < IMX_ECSPI_FIFO_SIZE) {
-    (*bus->push)(bus, regs);
-    ++bus->in_transfer;
-  }
-}
-
-static uint32_t imx_ecspi_conreg_divider(imx_ecspi_bus *bus, uint32_t speed_hz)
-{
-  uint32_t post;
-  uint32_t pre;
-  uint32_t clk_in;
-
-  clk_in = bus->base.max_speed_hz;
-
-  if (clk_in > speed_hz) {
-    post = fls((int) clk_in) - fls((int) speed_hz);
-
-    if (clk_in > (speed_hz << post)) {
-      ++post;
-    }
-
-    /* We have 2^4 == 16, use the pre-divider for this factor */
-    post = MAX(4, post) - 4;
-
-    if (post <= 0xf) {
-      pre = howmany(clk_in, speed_hz << post) - 1;
-    } else {
-      post = 0xf;
-      pre = 0xf;
-    }
-  } else {
-    post = 0;
-    pre = 0;
-  }
-
-  return IMX_ECSPI_CONREG_POST_DIVIDER(post)
-    | IMX_ECSPI_CONREG_PRE_DIVIDER(pre);
-}
-
-static void imx_ecspi_config(
-  imx_ecspi_bus *bus,
-  volatile imx_ecspi *regs,
-  uint32_t speed_hz,
-  uint8_t bits_per_word,
-  uint32_t mode,
-  uint8_t cs
-)
-{
-  uint32_t conreg;
-  uint32_t testreg;
-  uint32_t configreg;
-  uint32_t cs_bit;
-
-  conreg = IMX_ECSPI_CONREG_CHANNEL_MODE(0xf)
-    | IMX_ECSPI_CONREG_SMC | IMX_ECSPI_CONREG_EN;
-  testreg = regs->testreg;
-  configreg = regs->configreg;
-  cs_bit = 1U << cs;
-
-  conreg |= imx_ecspi_conreg_divider(bus, speed_hz);
-  conreg |= IMX_ECSPI_CONREG_CHANNEL_SELECT(cs);
-
-  configreg |= IMX_ECSPI_CONFIGREG_SS_CTL(cs_bit);
-
-  if ((mode & SPI_CPHA) != 0) {
-    configreg |= IMX_ECSPI_CONFIGREG_SCLK_PHA(cs_bit);
-  } else {
-    configreg &= ~IMX_ECSPI_CONFIGREG_SCLK_PHA(cs_bit);
-  }
-
-  if ((mode & SPI_CPOL) != 0) {
-    configreg |= IMX_ECSPI_CONFIGREG_SCLK_POL(cs_bit);
-    configreg |= IMX_ECSPI_CONFIGREG_SCLK_CTL(cs_bit);
-  } else {
-    configreg &= ~IMX_ECSPI_CONFIGREG_SCLK_POL(cs_bit);
-    configreg &= ~IMX_ECSPI_CONFIGREG_SCLK_CTL(cs_bit);
-  }
-
-  if ((mode & SPI_CS_HIGH) != 0) {
-    configreg |= IMX_ECSPI_CONFIGREG_SS_POL(cs_bit);
-  } else {
-    configreg &= ~IMX_ECSPI_CONFIGREG_SS_POL(cs_bit);
-  }
-
-  if ((mode & SPI_LOOP) != 0) {
-    testreg |= IMX_ECSPI_TESTREG_LBC;
-  } else {
-    testreg &= ~IMX_ECSPI_TESTREG_LBC;
-  }
-
-  regs->conreg = conreg;
-  regs->testreg = testreg;
-  regs->configreg = configreg;
-
-  bus->conreg = conreg;
-  bus->speed_hz = speed_hz;
-  bus->bits_per_word = bits_per_word;
-  bus->mode = mode;
-  bus->cs = cs;
-
-  /* FIXME: Clock change delay */
-}
-
-static void imx_ecspi_set_push_pop(
-  imx_ecspi_bus *bus,
-  uint32_t len,
-  uint8_t bits_per_word
-)
-{
-  uint32_t conreg;
-
-  conreg = bus->conreg;
-
-  if (len % 4 == 0 && len <= IMX_ECSPI_FIFO_SIZE) {
-    conreg |= IMX_ECSPI_CONREG_BURST_LENGTH((len * 8) - 1);
-
-    bus->push = imx_ecspi_push_uint32_t_swap;
-    bus->pop = imx_ecspi_pop_uint32_t_swap;
-  } else {
-    conreg |= IMX_ECSPI_CONREG_BURST_LENGTH(bits_per_word - 1);
-
-    if (bits_per_word <= 8) {
-      bus->push = imx_ecspi_push_uint8_t;
-      bus->pop = imx_ecspi_pop_uint8_t;
-    } else if (bits_per_word <= 16) {
-      bus->push = imx_ecspi_push_uint16_t;
-      bus->pop = imx_ecspi_pop_uint16_t;
-    } else {
-      bus->push = imx_ecspi_push_uint32_t;
-      bus->pop = imx_ecspi_pop_uint32_t;
-    }
-  }
-
-  bus->regs->conreg = conreg;
-}
-
-static void imx_ecspi_next_msg(imx_ecspi_bus *bus, volatile imx_ecspi *regs)
-{
-  if (bus->msg_todo > 0) {
-    const spi_ioc_transfer *msg;
-
-    msg = bus->msg;
-
-    if (
-      msg->speed_hz != bus->speed_hz
-        || msg->bits_per_word != bus->bits_per_word
-        || msg->mode != bus->mode
-        || msg->cs != bus->cs
-    ) {
-      imx_ecspi_config(
-        bus,
-        regs,
-        msg->speed_hz,
-        msg->bits_per_word,
-        msg->mode,
-        msg->cs
-      );
-    }
-
-    bus->todo = msg->len;
-    bus->rx_buf = msg->rx_buf;
-    bus->tx_buf = msg->tx_buf;
-    imx_ecspi_set_push_pop(bus, msg->len, msg->bits_per_word);
-    imx_ecspi_push(bus, regs);
-    regs->intreg = IMX_ECSPI_TE;
-  } else {
-    regs->intreg = 0;
-    imx_ecspi_done(bus);
-  }
-}
-
-static void imx_ecspi_interrupt(void *arg)
-{
-  imx_ecspi_bus *bus;
-  volatile imx_ecspi *regs;
-
-  bus = arg;
-  regs = bus->regs;
-
-  while (imx_ecspi_is_rx_fifo_not_empty(regs)) {
-    (*bus->pop)(bus, regs);
-    --bus->in_transfer;
-  }
-
-  if (bus->todo > 0) {
-    imx_ecspi_push(bus, regs);
-  } else if (bus->in_transfer > 0) {
-    regs->intreg = IMX_ECSPI_RR;
-  } else {
-    --bus->msg_todo;
-    ++bus->msg;
-    imx_ecspi_next_msg(bus, regs);
-  }
-}
-
-static int imx_ecspi_transfer(
-  spi_bus *base,
-  const spi_ioc_transfer *msgs,
-  uint32_t n
-)
-{
-  imx_ecspi_bus *bus;
-
-  bus = (imx_ecspi_bus *) base;
-
-  bus->msg_todo = n;
-  bus->msg = &msgs[0];
-  bus->task_id = rtems_task_self();
-
-  imx_ecspi_next_msg(bus, bus->regs);
-  rtems_event_transient_receive(RTEMS_WAIT, RTEMS_NO_TIMEOUT);
-  return 0;
-}
-
-static void imx_ecspi_destroy(spi_bus *base)
-{
-  imx_ecspi_bus *bus;
-
-  bus = (imx_ecspi_bus *) base;
-  rtems_interrupt_handler_remove(bus->irq, imx_ecspi_interrupt, bus);
-  spi_bus_destroy_and_free(&bus->base);
-}
-
-static int imx_ecspi_init(imx_ecspi_bus *bus, const void *fdt, int node)
-{
-  rtems_status_code sc;
-  int len;
-  const uint32_t *val;
-
-  imx_ecspi_config(
-    bus,
-    bus->regs,
-    bus->base.max_speed_hz,
-    8,
-    0,
-    0
-  );
-  imx_ecspi_reset(bus->regs);
-
-  sc = rtems_interrupt_handler_install(
-    bus->irq,
-    "ECSPI",
-    RTEMS_INTERRUPT_UNIQUE,
-    imx_ecspi_interrupt,
-    bus
-  );
-  if (sc != RTEMS_SUCCESSFUL) {
-    return EAGAIN;
-  }
-
-  val = fdt_getprop(fdt, node, "pinctrl-0", &len);
-  if (len == 4) {
-    imx_iomux_configure_pins(fdt, fdt32_to_cpu(val[0]));
-  }
-
-  return 0;
-}
-
-static int imx_ecspi_setup(spi_bus *base)
-{
-  imx_ecspi_bus *bus;
-
-  bus = (imx_ecspi_bus *) base;
-
-  if (
-    bus->base.speed_hz > imx_ccm_ipg_hz()
-      || bus->base.bits_per_word > 32
-  ) {
-    return -EINVAL;
-  }
-
-  imx_ecspi_config(
-    bus,
-    bus->regs,
-    bus->base.speed_hz,
-    bus->base.bits_per_word,
-    bus->base.mode,
-    bus->base.cs
-  );
-  return 0;
-}
-
-int spi_bus_register_imx(const char *bus_path, const char *alias_or_path)
-{
-  const void *fdt;
-  const char *path;
-  int node;
-  imx_ecspi_bus *bus;
-  int eno;
-
-  fdt = bsp_fdt_get();
-  path = fdt_get_alias(fdt, alias_or_path);
-
-  if (path == NULL) {
-    path = alias_or_path;
-  }
-
-  node = fdt_path_offset(fdt, path);
-  if (node < 0) {
-    rtems_set_errno_and_return_minus_one(ENXIO);
-  }
-
-  bus = (imx_ecspi_bus *) spi_bus_alloc_and_init(sizeof(*bus));
-  if (bus == NULL){
-    return -1;
-  }
-
-  bus->base.max_speed_hz = imx_ccm_ipg_hz();
-  bus->base.delay_usecs = 1;
-  bus->regs = imx_get_reg_of_node(fdt, node);
-  bus->irq = imx_get_irq_of_node(fdt, node, 0);
-
-  eno = imx_ecspi_init(bus, fdt, node);
-  if (eno != 0) {
-    (*bus->base.destroy)(&bus->base);
-    rtems_set_errno_and_return_minus_one(eno);
-  }
-
-  bus->base.transfer = imx_ecspi_transfer;
-  bus->base.destroy = imx_ecspi_destroy;
-  bus->base.setup = imx_ecspi_setup;
-
-  return spi_bus_register(&bus->base, bus_path);
-}