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https://github.com/torvalds/linux
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72b294cf76
This consolidates all of the TX/RX fill/room nonsense in to a single set of fairly heavyweight definitions. The implementation goes in descending order of complexity, testing the register map for capabilities until we run out of options and do it the legacy SCI way. Masks are derived directly from the per-port FIFO size, meaning that platforms with FIFO sizes not matching the standard port types will still need to manually fix them up. This also fixes up a number of issues such as tx_empty being completely bogus for SCI and IrDA ports, some ports using masks smaller or greater than their FIFO size, and so forth. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
39 lines
1.6 KiB
C
39 lines
1.6 KiB
C
#include <linux/serial_core.h>
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#include <linux/io.h>
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#include <linux/gpio.h>
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#define SCxSR_TEND(port) (((port)->type == PORT_SCI) ? SCI_TEND : SCIF_TEND)
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#define SCxSR_RDxF(port) (((port)->type == PORT_SCI) ? SCI_RDRF : SCIF_RDF)
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#define SCxSR_TDxE(port) (((port)->type == PORT_SCI) ? SCI_TDRE : SCIF_TDFE)
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#define SCxSR_FER(port) (((port)->type == PORT_SCI) ? SCI_FER : SCIF_FER)
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#define SCxSR_PER(port) (((port)->type == PORT_SCI) ? SCI_PER : SCIF_PER)
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#define SCxSR_BRK(port) (((port)->type == PORT_SCI) ? 0x00 : SCIF_BRK)
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#define SCxSR_ERRORS(port) (to_sci_port(port)->cfg->error_mask)
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#if defined(CONFIG_CPU_SUBTYPE_SH7705) || \
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defined(CONFIG_CPU_SUBTYPE_SH7720) || \
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defined(CONFIG_CPU_SUBTYPE_SH7721) || \
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defined(CONFIG_ARCH_SH73A0) || \
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defined(CONFIG_ARCH_SH7367) || \
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defined(CONFIG_ARCH_SH7377) || \
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defined(CONFIG_ARCH_SH7372)
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# define SCxSR_RDxF_CLEAR(port) (sci_in(port, SCxSR) & 0xfffc)
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# define SCxSR_ERROR_CLEAR(port) (sci_in(port, SCxSR) & 0xfd73)
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# define SCxSR_TDxE_CLEAR(port) (sci_in(port, SCxSR) & 0xffdf)
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# define SCxSR_BREAK_CLEAR(port) (sci_in(port, SCxSR) & 0xffe3)
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#else
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# define SCxSR_RDxF_CLEAR(port) (((port)->type == PORT_SCI) ? 0xbc : 0x00fc)
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# define SCxSR_ERROR_CLEAR(port) (((port)->type == PORT_SCI) ? 0xc4 : 0x0073)
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# define SCxSR_TDxE_CLEAR(port) (((port)->type == PORT_SCI) ? 0x78 : 0x00df)
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# define SCxSR_BREAK_CLEAR(port) (((port)->type == PORT_SCI) ? 0xc4 : 0x00e3)
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#endif
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/* SCFCR */
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#define SCFCR_RFRST 0x0002
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#define SCFCR_TFRST 0x0004
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#define SCFCR_MCE 0x0008
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#define SCI_MAJOR 204
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#define SCI_MINOR_START 8
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