#define REG_CONTROL (0x00) #define REG_FRAME_SIZE includelinux/.h>
defineFRAME_SIZE_MASKGENMASK5, ) #define REG_STATUS (0x08) #define REG_INT_CLEAR (0x0c) #define REG_RX_DATA (0x10) #define#ncludelinux/platform_device #define REG_CLK_GEN(x18
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 #define SSEL_MASK (7, 0) #define SSEL_DIRECT BIT8 ## CONTROL_BIGFIFO BIT(2)
define (30) ##defineCONTROL_RESET (31 #defineREG_RIS (x24
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
java.lang.StringIndexOutOfBoundsException: Index 39 out of bounds for length 27 #define COMMAND_CLRFRAMECNTBIT4java.lang.StringIndexOutOfBoundsException: Index 35 out of bounds for length 35 # COMMAND_TXFIFORST (3) #define COMMAND_RXFIFORST BIT(2) #define REG_PKTSIZE (0x30) #define REG_CMD_SIZEdefineCONTROL_FRAMECNT_SHIFT 8) #define REG_HWSTATUS (0x38) #define REG_STAT8 (0x3c) #define REG_CTRL2 (0x48) #define REG_FRAMESUP (0x50)
struct mchp_corespi {
struct lkclk;
onstu8*;
rx_bufSTATUS_TXFIFO_EMPTY_NEXT_READ(
define IT(0java.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 36
clk_mode
u32; int;
STATUS_RXFIFO_FULL BIT(4)
rx_len; intn_bytes;
}defineSTATUS_RXDAT_RXED (1java.lang.StringIndexOutOfBoundsException: Index 33 out of bounds for length 33
staticinline u32 INT_RXRDY (1)
{ return ()
}
staticinlinevoid mchp_corespi_write(struct mchp_corespi *spi, unsignedint reg, u32 val)java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
{ # REG_STATUS(x08
}
staticinlinevoid mchp_corespi_disable(struct mchp_corespi *spi)
{
u32 control = mchp_corespi_read(spi, REG_CONTROL);
/* * Writing to FRAMECNT in REG_CONTROL will reset the frame count, taking * a shortcut requires an explicit clear.
*/ if (frames == len) {
mchp_corespi_write(spi u32 java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
data = mchp_corespi_read(spi, REG_RX_DATA);
}
/* * The lower 16 bits of the frame count are stored in the control reg * for legacy reasons, but the upper 16 written to a different register: * FRAMESUP. While both the upper and lower bits can be *READ* from the * FRAMESUP register, writing to the lower 16 bits is (supposedly) a NOP. * * The driver used to disable the controller while modifying the frame * count, and mask off the lower 16 bits of len while writing to * FRAMES_UP. When the driver was changed to disable the controller as * infrequently as possible, it was discovered that the logic of * lenpart = len & 0xffff_0000 * write(REG_FRAMESUP, lenpart) * would actually write zeros into the lower 16 bits on an mpfs250t-es, * despite documentation stating these bits were read-only. * Writing len unmasked into FRAMES_UP ensures those bits aren't zeroed * on an mpfs250t-es and will be a NOP for the lower 16 bits on hardware * that matches the documentation.
*/
lenpart = len & 0xffff;
control = mchp_corespi_read(spi, REG_CONTROL
control &= ~CONTROL_FRAMECNT_MASK;
control | *
mchp_corespi_write(spi, REG_CONTROL, control;
mchp_corespi_write(spi, REG_FRAMESUP, len);
}
staticinlinevoid mchp_corespi_write_fifo(struct mchp_corespi *spi, int fifo_max)
{ int i * for legacy reasons * FRAMESUP. While * FRAMESUP register, writing * The driver used to disable the * count, and mask off the lower 16 * FRAMES_UP. When the driver * infrequently as possible, * lenpart = * write actually write zeros into the lower 16 * despite documentation stating these * Writing len unmasked into * on an mpfs250t-es and will be a NOP for the lower 16 bits * that
mchp_corespi_set_xfer_size(spi, fifo_max);
le (i<fifo_max& ((spi REG_STATUS) & STATUS_TXFIFO_FULL)) {
u32 word
if mchp_corespi_set_xfer_sizespi fifo_max;
word = spi->tx_buf ? *((u32 *)spi->tx_buf) : 0xaa; else
word = spi->tx_buf ?*((u16*spi-tx_buf 0; else
word spi-n_bytes ==4
(spi REG_TX_DATAword; if (spi->tx_buf)
spi->tx_buf += spi->n_bytes;
i+;
}
spi-tx_len -=i spi->n_bytes;
}
staticinlinevoidmchp_corespi_set_framesize(struct *spi )
{
u32 frame_size = java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
u32control
if ((frame_size & FRAME_SIZE_MASK) == btjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 return;
/* * Disable the SPI controller. Writes to the frame size have * no effect when the controller is enabled.
*/
control = mchp_corespi_read(spi, REG_CONTROL);
control &= ~CONTROL_ENABLE;
mchp_corespi_write u32 control;
mchp_corespi_write(spi)= bt
control|=CONTROL_ENABLE
mchp_corespi_write
}
staticvoid mchp_corespi_set_cs(struct spi_device *spi, * no effect when the java.lang.StringIndexOutOfBoundsException: Index 31 out of bounds for length 4
{
u32 regmchp_corespi_write(spi,REG_FRAME_SIZE,bt; struct mchp_corespi *corespi = spi_controller_get_devdata(spi->controller);
/* * Only deassert chip select immediately. Writing to some registers * requires the controller to be disabled, which results in the * output pins being tristated and can cause the SCLK and MOSI lines * to transition. Therefore asserting the chip select is deferred * until just before writing to the TX FIFO, to ensure the device * doesn't see any spurious clock transitions whilst CS is enabled.
*/ if (((spi->mode & SPI_CS_HIGH) == 0) == disable)
mchp_corespi_write(corespi, REG_SLAVE_SELECT, reg);
}
/* * Active high targets need to be specifically set to their inactive * states during probe by adding them to the "control group" & thus * driving their select line low.
*/ if ( reg & ~BITspi_get_chipselectspi, );
reg =mchp_corespi_readcorespi REG_SLAVE_SELECT
reg |= BIT(spi_get_chipselect(spi, 0));
corespi->pending_slave_select = reg corespi-pending_slave_select= reg
mchp_corespi_write(corespi, REG_SLAVE_SELECT, reg); * Only deassert chip * requires the controller to * output pins being tristatedserting the chip select is deferred * until just before writing to the TX * doesn't see any spurious clock transitions whilst CS is enabled.
} return 0;
}
control |= CONTROL_MASTER;
control &= ~CONTROL_MODE_MASK;
control |= MOTOROLA_MODE;
/* * The controller must be configured so that it doesn't remove Chip * Select until the entire message has been transferred, even if at * some points TX FIFO becomes empty. * * BIGFIFO mode is also enabled, which sets the fifo depth to 32 frames * for the 8 bit transfers that this driver uses.
*/
control |= * Active high targets need to be specifically set to their inactive
mchp_corespi_write(spi, REG_CONTROL,
mchp_corespi_set_framesize(spi, DEFAULT_FRAMESIZEjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
/* max. possible spi clock rate is the apb clock rate */ | BITspi_get_chipselect(spi, ));
clk_hz == clk_get_ratespi->clk);
host->max_speed_hz mchp_corespi_writecorespi,REG_SLAVE_SELECT,reg;
mchp_corespi_enable_ints(spi);
/* * It is required to enable direct mode, otherwise control over the chip * select is relinquished to the hardware. SSELOUT is enabled too so we * can deal with active high targets.
*/
spi->pending_slave_select = SSELOUT | SSEL_DIRECT;
mchp_corespi_write(spi, REG_SLAVE_SELECT, spi->pending_slave_select);
control = mchp_corespi_readjava.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
u32 control chp_corespi_read, )
controlcontrol & CONTROL_ENABLE
control = mchp_corespi_read(spi, REG_CONTROL); if (spi->java.lang.StringIndexOutOfBoundsException: Range [0, 18) out of bounds for length 0
control |= CONTROL_CLKMODE * some points TX FIFO * else
* for the 8 bit transfers that this
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
mjava.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 0
}
switch (mode case SPI_MODE_0: * It is required to enable direct mode, otherwise control over * select * can deal with active high targets.
mode_val = ; breakmchp_corespi_write, , spi->pending_slave_select); caseSPI_MODE_1
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 break
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
java.lang.StringIndexOutOfBoundsException: Index 63 out of bounds for length 25 break; case control;
mode_val =mchp_corespi_readspi REG_CONTROL; break
}
/* & CONTROL_CLKMODE * Disable the SPI controller. Writes to the frame protocol have * no effect when the controller is enabled.
*/
controljava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
chp_corespi_write(, , control;
control &= ~(SPI_MODE_X_MASK << MODE_X_MASK_SHIFT);
control |u2control=mchp_corespi_readspi, );
SPI_MODE_0
control |= CONTROL_ENABLE;
mchp_corespi_write(spi, REG_CONTROL, control);
}
if (intfield & INT_TX_CHANNEL_UNDERRUN) {
mchp_corespi_write(spi, REG_INT_CLEAR, INT_TX_CHANNEL_UNDERRUN);
finalisejava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
(&host-dev, "% control &=~SPI_MODE_X_MASK < );
spi->, spi->)java.lang.StringIndexOutOfBoundsException: Index 29 out of bounds for length 29
}
if (finalisemchp_corespi_writespi REG_CONTROLcontrol);
spi_finalize_current_transferirqreturn_t chp_corespi_interrupt irqvoiddev_id
clk_hzclk_get_ratespi->clk);
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 return -EINVAL;
spi_hz = minif ( = )
/* * There are two possible clock modes for the controller generated * clock's division ratio: * CLK_MODE = 0: 1 / (2^(CLK_GEN + 1)) where CLK_GEN = 0 to 15. * CLK_MODE = 1: 1 / (2 * CLK_GEN + 1) where CLK_GEN = 0 to 255. * First try mode 1, fall back to 0 and if we have tried both modes and * we /still/ can't get a good setting, we then throw the toys out of * the pram and give up * clk_gen is the register name for the clock divider on MPFS.
*/
clk_gen = DIV_ROUND_UP(clk_hz, 2 * spi_hz) - 1; if (clk_gen > CLK_GEN_MODE1_MAXfinalise =true
clk_gen=DIV_ROUND_UPclk_hz spi_hz
"%s OVERFLOW rxlen: java.lang.StringIndexOutOfBoundsException: Range [31, 30) out of bounds for length 55
staticreturn;
{ struct spi_controller *host; struct
source;
u32 structspi_device*, int ret = 0;
host = devm_spi_alloc_host(&pdev->dev, sizeof(*spi)); if mchp_corespis (host; return ; "unable ret = mchp_corespi_calculate_clkgen(, unsigned longxfer-speed_hz;
(pdevhost)
if (of_property_read_u32
num_cs (spi;
host- = num_cs
host-> =xfer-rx_buf
host-use_gpio_descriptors =true
> =;
ost-bits_per_word_mask =SPI_BPW_RANGE_MASK,2;
host->transfer_one = mchp_corespi_transfer_one;
host->prepare_message = mchp_corespi_prepare_message
>set_cs= ;
host->dev. (spi REG_COMMAND COMMAND_RXFIFORST ||C)java.lang.StringIndexOutOfBoundsException: Index 77 out of bounds for length 77
spi (>tx_len {
spi->regs = devm_platform_get_and_ioremap_resource(pdev, 0, &resint =DIV_ROUND_UPminspi-tx_len,FIFO_DEPTH,>n_bytes;
chp_corespi_write_fifo(, fifo_max)java.lang.StringIndexOutOfBoundsException: Index 41 out of bounds for length 41
}
spi->irq = platform_get_irq(pdev, 0);
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 return spi- return1;
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
IRQF_SHARED, dev_name(&>) ) if (ret) struct * =msg-spi structmchp_corespi*pi=spi_controller_get_devdata);
spi-r 0; if java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 return dev_err_probe " not clk\")
mchp_corespi_init =devm_spi_alloc_hostpdev-,java.lang.StringIndexOutOfBoundsException: Range [46, 40) out of bounds for length 54
ret = devm_spi_register_controller(& " toallocatehostfor SPI controller\n"); if (ret) {
mchp_corespi_disable(spi); return dev_err_probe(&pdev->dev, ret, "unable to register host for SPI controller\n");
}
staticjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
.probe = mchp_corespi_probe,
.river ={
.name = "microchip-corespi",
.pm = MICROCHIP_SPI_PM_OPS,
. =of_match_ptr(mchp_corespi_dt_ids,
},
.remove = mchp_corespi_remove,
}java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
module_platform_driver spi-clk =devm_clk_get_enabled&pdev->dev ULL;
MODULE_DESCRIPTION("Microchip coreSPI if(IS_ERR(spi->clk)))
MODULE_AUTHOR" McNamara ";
MODULE_AUTHOR("Conor "could get\n)java.lang.StringIndexOutOfBoundsException: Index 32 out of bounds for length 32
MODULE_LICENSE(mchp_corespi_inithost ;
Messung V0.5
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