diff options
Diffstat (limited to 'arch/powerpc/sysdev/bestcomm/gen_bd.c')
| -rw-r--r-- | arch/powerpc/sysdev/bestcomm/gen_bd.c | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/arch/powerpc/sysdev/bestcomm/gen_bd.c b/arch/powerpc/sysdev/bestcomm/gen_bd.c index 8d33eafbb3f..a3a134c35b0 100644 --- a/arch/powerpc/sysdev/bestcomm/gen_bd.c +++ b/arch/powerpc/sysdev/bestcomm/gen_bd.c @@ -20,6 +20,7 @@ #include <asm/io.h> #include <asm/mpc52xx.h> +#include <asm/mpc52xx_psc.h> #include "bestcomm.h" #include "bestcomm_priv.h" @@ -253,6 +254,100 @@ bcom_gen_bd_tx_release(struct bcom_task *tsk) } EXPORT_SYMBOL_GPL(bcom_gen_bd_tx_release); +/* --------------------------------------------------------------------- + * PSC support code + */ + +/** + * bcom_psc_parameters - Bestcomm initialization value table for PSC devices + * + * This structure is only used internally. It is a lookup table for PSC + * specific parameters to bestcomm tasks. + */ +static struct bcom_psc_params { + int rx_initiator; + int rx_ipr; + int tx_initiator; + int tx_ipr; +} bcom_psc_params[] = { + [0] = { + .rx_initiator = BCOM_INITIATOR_PSC1_RX, + .rx_ipr = BCOM_IPR_PSC1_RX, + .tx_initiator = BCOM_INITIATOR_PSC1_TX, + .tx_ipr = BCOM_IPR_PSC1_TX, + }, + [1] = { + .rx_initiator = BCOM_INITIATOR_PSC2_RX, + .rx_ipr = BCOM_IPR_PSC2_RX, + .tx_initiator = BCOM_INITIATOR_PSC2_TX, + .tx_ipr = BCOM_IPR_PSC2_TX, + }, + [2] = { + .rx_initiator = BCOM_INITIATOR_PSC3_RX, + .rx_ipr = BCOM_IPR_PSC3_RX, + .tx_initiator = BCOM_INITIATOR_PSC3_TX, + .tx_ipr = BCOM_IPR_PSC3_TX, + }, + [3] = { + .rx_initiator = BCOM_INITIATOR_PSC4_RX, + .rx_ipr = BCOM_IPR_PSC4_RX, + .tx_initiator = BCOM_INITIATOR_PSC4_TX, + .tx_ipr = BCOM_IPR_PSC4_TX, + }, + [4] = { + .rx_initiator = BCOM_INITIATOR_PSC5_RX, + .rx_ipr = BCOM_IPR_PSC5_RX, + .tx_initiator = BCOM_INITIATOR_PSC5_TX, + .tx_ipr = BCOM_IPR_PSC5_TX, + }, + [5] = { + .rx_initiator = BCOM_INITIATOR_PSC6_RX, + .rx_ipr = BCOM_IPR_PSC6_RX, + .tx_initiator = BCOM_INITIATOR_PSC6_TX, + .tx_ipr = BCOM_IPR_PSC6_TX, + }, +}; + +/** + * bcom_psc_gen_bd_rx_init - Allocate a receive bcom_task for a PSC port + * @psc_num: Number of the PSC to allocate a task for + * @queue_len: number of buffer descriptors to allocate for the task + * @fifo: physical address of FIFO register + * @maxbufsize: Maximum receive data size in bytes. + * + * Allocate a bestcomm task structure for receiving data from a PSC. + */ +struct bcom_task * bcom_psc_gen_bd_rx_init(unsigned psc_num, int queue_len, + phys_addr_t fifo, int maxbufsize) +{ + if (psc_num >= MPC52xx_PSC_MAXNUM) + return NULL; + + return bcom_gen_bd_rx_init(queue_len, fifo, + bcom_psc_params[psc_num].rx_initiator, + bcom_psc_params[psc_num].rx_ipr, + maxbufsize); +} +EXPORT_SYMBOL_GPL(bcom_psc_gen_bd_rx_init); + +/** + * bcom_psc_gen_bd_tx_init - Allocate a transmit bcom_task for a PSC port + * @psc_num: Number of the PSC to allocate a task for + * @queue_len: number of buffer descriptors to allocate for the task + * @fifo: physical address of FIFO register + * + * Allocate a bestcomm task structure for transmitting data to a PSC. + */ +struct bcom_task * +bcom_psc_gen_bd_tx_init(unsigned psc_num, int queue_len, phys_addr_t fifo) +{ + struct psc; + return bcom_gen_bd_tx_init(queue_len, fifo, + bcom_psc_params[psc_num].tx_initiator, + bcom_psc_params[psc_num].tx_ipr); +} +EXPORT_SYMBOL_GPL(bcom_psc_gen_bd_tx_init); + MODULE_DESCRIPTION("BestComm General Buffer Descriptor tasks driver"); MODULE_AUTHOR("Jeff Gibbons <jeff.gibbons@appspec.com>"); |