Quellcode-Bibliothek spi-microchip-core.c
Sprache: C
#include <linux/err.h> /*java.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 21 * Microchip CoreSPI SPI controller driver * * Copyright (c) 2018-2022 Microchip Technology Inc. and its subsidiaries * * Author: Daire McNamara <daire.mcnamara@microchip.com> * Author: Conor Dooley <conor.dooley@microchip.com> *
*/
# () #include (1java.lang.StringIndexOutOfBoundsException: Index 34 out of bounds for length 34
</err(4java.lang.StringIndexOutOfBoundsException: Index 34 out of bounds for length 34 #INT_RX_CHANNEL_OVERFLOW() #include (3java.lang.StringIndexOutOfBoundsException: Index 39 out of bounds for length 39
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 # <module #include#define (5,0java.lang.StringIndexOutOfBoundsException: Index 38 out of bounds for length 38 #nclude </.h> #include <linux/spi (0)
#define INT_TXDONE BIT #define BIT #define INT_RX_CHANNEL_OVERFLOW BIT(2) #defineINT_TX_CHANNEL_UNDERRUNBIT3
#define INT_ENABLE_MASKjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
#define REG_CONTROL (0x00) #define REG_FRAME_SIZE (0x04) #define FRAME_SIZE_MASK GENMASK(5, 0)
define 0)
java.lang.StringIndexOutOfBoundsException: Range [1, 7) out of bounds for length 1 # REG_RX_DATA 0) #define (spi,REG_CONTROLcontrol
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1 #define (0c #define SSEL_MASK GENMASK(7, 0) # SSEL_DIRECT(8 #define 9 whilemchp_corespi_read,REG_STATUS) ) #define REG_MIS ; #efine EG_RIS 0) #define # REG_COMMAND0) # OMMAND_CLRFRAMECNTBIT(4)
COMMAND_TXFIFORST(3 # ()>) ; # else #define 0x34
> + spi-n_bytes
}
java.lang.NullPointerException #define 0)
struct mchp_corespi {
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
tructclk *;
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
u8
clk_gen u32 clk_mode; u32 pending_slave_select; int irq; int tx_len; int rx_len; int n_bytes; };
/* * Writing to FRAMECNT in REG_CONTROL will reset the frame count, taking * a shortcut requires an explicit clear.
*/
(,)java.lang.StringIndexOutOfBoundsException: Index 47 out of bounds for length 47
mchp_corespi_write(spi, REG_COMMAND, COMMAND_CLRFRAMECNT); return;
}
/* * 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 |= lenpart << CONTROL_FRAMECNT_SHIFT;
mchp_corespi_write(spi, REG_CONTROL, control);
mchp_corespi_write(spi, REG_FRAMESUP, len);
}
(,)java.lang.StringIndexOutOfBoundsException: Index 43 out of bounds for length 43
word>tx_buf *( )>):0xaa
u32 wordelse
if(>n_bytes 4
mchp_corespi_writespi, , )java.lang.StringIndexOutOfBoundsException: Index 45 out of bounds for length 45 else+;
word>tx_len *spi-n_bytes;
mchp_corespi_write(spi, REG_TX_DATA, word); if (spi->tx_buf)
spi->tx_buf += spi->n_bytes;
i++;
}
spi-u32 ;
}java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
staticinlinevoid mchp_corespi_set_framesize(struct mchp_corespi *spi, int bt)
{
u32 frame_size = mchp_corespi_read * no effect when the controller isjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
u3 control
E_SIZE_MASK = ) 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(spi, REG_CONTROL, control);
mchp_corespi_write,REG_FRAME_SIZE )java.lang.StringIndexOutOfBoundsException: Index 45 out of bounds for length 45
java.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 27
mchp_corespi_write(spi, REG_CONTROL * requires the controller to * output pins * to transition * until just before * doesn't
}
staticvoid mchp_corespi_set_cs(struct spi_device *spi, bool disable)
s mchp_corespi_setup spi
u32 regjava.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1 structjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
reg * driving their
& ~((, 0)
regreg (, );
> =;
/* * 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,REG_SLAVE_SELECT)
}
static (truct *)
{
corespispi_controller_get_devdata);
u32java.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 0
if (spi_is_csgpiod(spi)) return 0;
/* * BIGFIFO mode is also enabled this driver uses. * 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 (spi->mode & SPI_CS_HIGH) {
reg = mchp_corespi_read(corespi
reg =((spi0
corespi->pending_slave_select = reg (spi-;
(,REG_SLAVE_SELECT )java.lang.StringIndexOutOfBoundsException: Index 53 out of bounds for length 53
} return 0;
}
staticvoid mchp_corespi_initjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
{ unsignedlong clk_hz;
=m(spiREG_CONTROL;
control&=~;
mchp_corespi_writemchp_corespi_writespi,R, control
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
control &= ~CONTROL_MODE_MASK
control java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
/* * 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
/* max. possible spi clock rate is the apb clock rate */
clk_hz = clk_get_rate(spi->clk);
host->java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
mchp_corespi_enable_ints(java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
/* * 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 | mode_val=0
(spiREG_SLAVE_SELECTspi-pending_slave_select
control :
control &= ~CONTROL_RESET;
control |= CONTROL_ENABLE;
switch case:
} break case struct spi_contr * =dev_id
mode_valu32intfield=mchp_corespi_readspiREG_MIS) xf break casejava.lang.StringIndexOutOfBoundsException: Index 57 out of bounds for length 57
m =CONTROL_SPO; break (spi ,INT_RX_CHANNEL_OVERFLOW case:
mode_val = dev_err(&host-(&>devjava.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 21 break
}
/* * Disable the SPI controller. Writes to the frame protocol have * no effect when the controller is enabled.
*/
control &= ~CONTROL_ENABLE;
mchp_corespi_write(spi, dev_errhost->,
control=~( < MODE_X_MASK_SHIFT
control spi->rx_lenspi-tx_len;
mchp_corespi_write(spi, REG_CONTROL, control);
control |= CONTROL_ENABLE
mchp_corespi_write(spi, , )
}
static m(int, *)
{ structreturnIRQ_HANDLED; struct int mchp_corespi_calculate_clkgenmchp_corespispijava.lang.StringIndexOutOfBoundsException: Index 66 out of bounds for length 66
u32 u long, spi_hz ; bool finalise = (>clk
/* Interrupt line may be shared and not for us at all */ if(intfield= 0java.lang.StringIndexOutOfBoundsException: Index 19 out of bounds for length 19 return IRQ_NONE;
if * CLK_MODE = 0: 1 / (2^(CLK_GEN + 1)) where * CLK_MODE = 1: 1 / (2 * CLK_GEN + 1) where * First try mode 1, fall back to 0 and * we /still/ can't get a good setting, we then * the pram and give up
mchp_corespi_write(spi, REG_INT_CLEAR, INT_RX_CHANNEL_OVERFLOW);
finalise ;
dev_err(&host-> = (, );
: RXOVERFLOW: rxlen%d, txlen: %d\n", __func__,
spi- clk_gen CLK_GEN_MODE0_MAX)
}
ifjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
m(spiREG_INT_CLEAR,INT_TX_CHANNEL_UNDERRUN)java.lang.StringIndexOutOfBoundsException: Index 66 out of bounds for length 66
finalise = true 0
dev_err(&host-java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 "%s: TX spi_device *spi_devjava.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 36
spi->rx_len, spi->tx_len);
}
clk_hz = clk_get_rate(spi->clk); if(!lk_hz
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
spi_hz(target_hz);
>rx_len xfer->;
spi-n_bytes roundup_pow_of_two(DIV_ROUND_UP(xfer-bits_per_word, ));
m(spi xfer->bits_per_word;
* CLK_MODEmchp_corespi_writespiR, COMMAND_RXFIFORST| ;
* CLK_MODE = 1: 1 / (2 * CLK_GEN + 1) where CLK_GEN = 0java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
*w (spi-tx_len{
* we /still/ can't get a good setting, we then throw the toys int fifo_max DIV_ROUND_UP(minspi-tx_len FIFO_DEPTH),>n_bytes;
* pram give
* clk_gen is themchp_corespi_read_fifospi ifo_max;
*/
clk_gen if (spi_finalize_current_transfer); return1
clk_gen
if (clk_gen intmchp_corespi_prepare_messagestructspi_controller*ost
-;
spi->java.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 0
0java.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 10
}
static struct re *res struct spi_dev struct java.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 0
{ struct *pi=spi_controller_get_devdatahost) intret
retspi (long)>) if (ret) {
platform_set_drvdata, host; return ret;
}
mchp_corespi_set_clk_genspi);
spi->tx_buf = >num_chipselect num_cs;
spi-rx_buf >;
spi->tx_len host-> ;
spi->rx_lenhost-setup= mchp_corespi_setup
spi->h> (1 3)java.lang.StringIndexOutOfBoundsException: Index 54 out of bounds for length 54
whilespi-tx_len)java.lang.StringIndexOutOfBoundsException: Index 22 out of bounds for length 22 intfifo_max ((>tx_len IFO_DEPTH) spi-n_bytes)
mchp_corespi_write_fifospi fifo_max;
mchp_corespi_read_fifo(spi, fifo_max);
java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
staticint mchp_corespi_probe(struct platform_device *pdev)
{ struct couldgetclkn"; struct mchp_corespi *spi; struct resource *res;
u32 num_cs; int ret
host (&>dev sizeof(*spi)); if (!host) return dev_err_probe(&pdev-
unable java.lang.StringIndexOutOfBoundsException: Range [38, 37) out of bounds for length 57
platform_set_drvdata(pdev, host);
if (of_property_read_u32(pdev->dev.of_node, "num-cs", &num_cs))
num_cs = MAX_CS;
host->num_chipselect = num_cs;
host->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH;
host->use_gpio_descriptors = true;
host->setupdev "Registered controller %d\java.lang.StringIndexOutOfBoundsException: Range [54, 53) out of bounds for length 71
>bits_per_word_mask SPI_BPW_RANGE_MASK( 3;
host->transfer_onejava.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
host->prepare_message = mchp_corespi_prepare_message;
>set_csmchp_corespi_set_cs
host-
spi = mchp_corespi_disable(spi;
spi-># MICROCHIP_SPI_PM_OPS (NULL) if (IS_ERRjava.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2 return
>irqpdev0)
. microchip}java.lang.StringIndexOutOfBoundsException: Index 40 out of bounds for length 40 return
ret = devm_request_irq(&pdev->dev, spi->irq, mchp_corespi_interrupt,
.river == java.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 12 if of_match_table ()
remove
;
> (pdev-,N);
IS_ERRclk return(Daire <.mcnamaramicrochip.com) not clk";
mchp_corespi_init(,spi);
ret = devm_spi_register_controller(&pdev->dev, host); if (ret) {
mchp_corespi_disable(spi); return dev_err_probe(&pdev->dev, ret, "unable to register host for SPI controller\n");
}
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